Index: core/admin_templates/themes/themes_edit.tpl
===================================================================
--- core/admin_templates/themes/themes_edit.tpl
+++ core/admin_templates/themes/themes_edit.tpl
@@ -61,6 +61,8 @@
 			<inp2:m_RenderElement name="inp_edit_textarea" prefix="theme" field="Description" title="la_fld_Description" cols="25" rows="3"/>
 			<inp2:m_RenderElement name="inp_edit_checkbox" prefix="theme" field="Enabled" title="la_fld_Enabled"/>
 			<inp2:m_RenderElement name="inp_edit_box" prefix="theme" field="CacheTimeout" title="la_prompt_lang_cache_timeout"/>
+			<inp2:m_RenderElement name="inp_edit_box" prefix="theme" field="StylesheetFile"/>
+
 <!--##
 			<inp2:m_if check="m_ModuleEnabled" module="In-Portal">
 				<inp2:m_RenderElement name="inp_edit_options" prefix="theme" field="StylesheetId" title="la_prompt_Stylesheet" has_empty="1"/>
@@ -70,4 +72,4 @@
 			<inp2:m_RenderElement name="inp_edit_filler"/>
 	</table>
 </div>
-<inp2:m_include t="incs/footer"/>
\ No newline at end of file
+<inp2:m_include t="incs/footer"/>
Index: core/install/english.lang
===================================================================
--- core/install/english.lang
+++ core/install/english.lang
@@ -265,6 +265,7 @@
 			<PHRASE Label="la_error_copy_subcategory" Module="Core" Type="1">RXJyb3IgY29weWluZyBzdWJzZWN0aW9ucw==</PHRASE>
 			<PHRASE Label="la_error_CustomExists" Module="Core" Type="1">Q3VzdG9tIGZpZWxkIHdpdGggaWRlbnRpY2FsIG5hbWUgYWxyZWFkeSBleGlzdHM=</PHRASE>
 			<PHRASE Label="la_error_EmailTemplateBodyMissing" Module="Core" Type="1">RW1haWwgRGVzaWduIFRlbXBsYXRlIHNob3VsZCBjb250YWluIGF0IGxlYXN0ICIkYm9keSIgdGFnIGluIGl0Lg==</PHRASE>
+			<PHRASE Label="la_error_FileNotFound" Module="Core" Type="1">RmlsZSBub3QgZm91bmQ=</PHRASE>
 			<PHRASE Label="la_error_FileTooLarge" Module="Core" Type="1">RmlsZSBpcyB0b28gbGFyZ2U=</PHRASE>
 			<PHRASE Label="la_error_GroupNotFound" Module="Core" Type="1">Z3JvdXAgbm90IGZvdW5k</PHRASE>
 			<PHRASE Label="la_error_InvalidFieldName" Module="Core" Type="1">RmllbGQgZG9lc24ndCBleGlzdCBpbiAiJXMiIHVuaXQgY29uZmln</PHRASE>
@@ -669,6 +670,7 @@
 			<PHRASE Label="la_fld_Status" Module="Core" Type="1" Column="U3RhdHVz">U3RhdHVz</PHRASE>
 			<PHRASE Label="la_fld_Sticky" Module="Core" Type="1" Column="U3RpY2t5">U3RpY2t5</PHRASE>
 			<PHRASE Label="la_fld_StopWord" Module="Core" Type="1" Column="U3RvcCBXb3Jk">U3RvcCBXb3Jk</PHRASE>
+			<PHRASE Label="la_fld_StylesheetFile" Module="Core" Type="1" Hint="UmVsYXRpdmUgcGF0aCB0byBzdHlsZXNoZWV0IGZpbGUgd2l0aGluIHRoZW1lIChlLmcuICJpbmMvc3R5bGUuY3NzIiku" Column="U3R5bGVzaGVldCBGaWxl">U3R5bGVzaGVldCBGaWxl</PHRASE>
 			<PHRASE Label="la_fld_Subject" Module="Core" Type="1" Column="U3ViamVjdA==">U3ViamVjdA==</PHRASE>
 			<PHRASE Label="la_fld_SubmissionTime" Module="Core" Type="1">U3VibWl0dGVkIE9u</PHRASE>
 			<PHRASE Label="la_fld_SubmitNotifyEmail" Module="Core" Type="1" Hint="RW1haWwgYWRkcmVzcyB3aGVyZSBub3RpZmljYXRpb24gYWJvdXQgbmV3IHN1Ym1pc3Npb25zIHdpbGwgYmUgc2VuZCB0by4gRGVmYXVsdCBlbWFpbCBhZGRyZXNzIHdpbGwgYmUgdXNlZCBpZiB0aGlzIGZpZWxkIGlzIGxlZnQgYmxhbmsu" Column="U3VibWlzc2lvbiBOb3RpZmljYXRpb24gRW1haWw=">U3VibWlzc2lvbiBOb3RpZmljYXRpb24gRW1haWw=</PHRASE>
Index: core/install/install_schema.sql
===================================================================
--- core/install/install_schema.sql
+++ core/install/install_schema.sql
@@ -352,6 +352,7 @@
   StylesheetId int(10) unsigned NOT NULL DEFAULT '0',
   LanguagePackInstalled tinyint(3) unsigned NOT NULL DEFAULT '0',
   TemplateAliases text,
+  StylesheetFile varchar(255) NOT NULL DEFAULT '',
   PRIMARY KEY (ThemeId),
   KEY Enabled (Enabled),
   KEY StylesheetId (StylesheetId),
@@ -1422,4 +1423,4 @@
   TransitionEffect varchar(255) NOT NULL DEFAULT '',
   TransitionEffectCustom varchar(255) NOT NULL DEFAULT '',
   PRIMARY KEY (PromoBlockGroupId)
-);
\ No newline at end of file
+);
Index: core/install/upgrades.sql
===================================================================
--- core/install/upgrades.sql
+++ core/install/upgrades.sql
@@ -2922,3 +2922,6 @@
 UPDATE LanguageLabels
 SET l1_Translation = 'Field value length is out of range, possible value length from {min_length} to {max_length}'
 WHERE PhraseKey = 'LA_ERR_LENGTH_OUT_OF_RANGE';
+
+ALTER TABLE Themes ADD StylesheetFile VARCHAR( 255 ) NOT NULL DEFAULT '';
+UPDATE Themes SET StylesheetFile = 'platform/inc/styles.css' WHERE `Name` = 'advanced';
Index: core/kernel/db/db_tag_processor.php
===================================================================
--- core/kernel/db/db_tag_processor.php
+++ core/kernel/db/db_tag_processor.php
@@ -2534,9 +2534,13 @@
 		$value = $this->Field($params);
 		$name = array_key_exists('name', $params) ? $params['name'] : $this->InputName($params);
 
-		$theme_path = $this->Application->GetFrontThemePath() . '/inc';
+		/** @var ThemeItem $theme */
+		$theme = $this->Application->recallObject('theme.current');
+		$stylesheet_file = $theme->getStylesheetFile(true);
 
-		if ( file_exists(FULL_PATH . $theme_path . '/style.css') ) {
+		if ( $stylesheet_file ) {
+			$stylesheet_folder_url = dirname($stylesheet_file) . '/';
+
 			$url_params = Array (
 				'events[fck]' => 'OnGetsEditorStyles',
 				'no_pass_through' => 1, 'pass' => 'm', 'no_amp' => 1
@@ -2545,11 +2549,11 @@
 			$styles_css = $this->Application->HREF('index', '_FRONT_END_', $url_params, 'index.php');
 		}
 		else {
-			$theme_path = rtrim(EDITOR_PATH, '/');
-			$styles_css = $this->Application->BaseURL($theme_path) . 'style.css';
+			$stylesheet_folder_url = $this->Application->BaseURL(rtrim(EDITOR_PATH, '/'));
+			$styles_css = $stylesheet_folder_url . 'style.css';
 		}
 
-		$styles_js = $this->Application->BaseURL($theme_path) . 'styles.js';
+		$styles_js = $stylesheet_folder_url . 'styles.js';
 
 		/*$page_id = $this->Application->GetVar('c_id');
 		$content_id = $this->Application->GetVar('content_id');
@@ -3156,4 +3160,4 @@
 
 		return '';
 	}
-}
\ No newline at end of file
+}
Index: core/units/fck/fck_eh.php
===================================================================
--- core/units/fck/fck_eh.php
+++ core/units/fck/fck_eh.php
@@ -243,12 +243,15 @@
 		 */
 		function OnGetsEditorStyles($event)
 		{
+			/** @var ThemeItem $theme */
+			$theme = $this->Application->recallObject('theme.current');
+
+			/** @var MinifyHelper $minify_helper */
 			$minify_helper = $this->Application->recallObject('MinifyHelper');
-			/* @var $minify_helper MinifyHelper */
 
 			$this->Application->InitParser();
-			$styles_css = $minify_helper->CompressScriptTag( Array ('files' => 'inc/style.css') );
+			$styles_css = $minify_helper->CompressScriptTag(array('files' => $theme->getStylesheetFile(true)));
 
 			$event->redirect = 'external:' . $styles_css;
 		}
-	}
\ No newline at end of file
+	}
Index: core/units/helpers/themes_helper.php
===================================================================
--- core/units/helpers/themes_helper.php
+++ core/units/helpers/themes_helper.php
@@ -75,6 +75,8 @@
 			}
 
 			$this->themeFiles = Array ();
+			$theme_path = $this->themesFolder . '/' . $theme_name;
+
 			if ($theme_id) {
 				if (!$theme_enabled) {
 					// don't process existing theme files, that are disabled
@@ -95,6 +97,8 @@
 			}
 			else {
 				// theme was not found in db, but found on hdd -> create new
+				$config = $this->getConfiguration($theme_path);
+
 				$theme_info = Array (
 					 'Name' => $theme_name,
 					 'Enabled' => 0,
@@ -102,7 +106,8 @@
 					 'PrimaryTheme' => 0,
 					 'CacheTimeout' => 3600, // not in use right now
 					 'StylesheetId' => 0,	  // not in use right now
-					 'LanguagePackInstalled' => 0
+					 'LanguagePackInstalled' => 0,
+					 'StylesheetFile' => isset($config['stylesheet_file']) ? $config['stylesheet_file'] : '',
 				);
 
 				$this->Conn->doInsert($theme_info, $table_name);
@@ -115,7 +120,6 @@
 			}
 
 			$this->_themeNames[$theme_id] = $theme_name;
-			$theme_path = $this->themesFolder.'/'.$theme_name;
 			$this->FindThemeFiles('', $theme_path, $theme_id); // search from base theme directory
 
 			// delete file records from db, that were not found on hdd
@@ -230,6 +234,37 @@
 			}
 
 			return $template_aliases;
+		}
+
+		/**
+		 * Returns theme configuration.
+		 *
+		 * @param string $theme_path Absolute path to theme.
+		 *
+		 * @return array
+		 */
+		protected function getConfiguration($theme_path)
+		{
+			$xml_file = $theme_path . '/_install/theme.xml';
+
+			if ( !file_exists($xml_file) ) {
+				return array();
+			}
+
+			$theme = simplexml_load_file($xml_file);
+
+			if ( $theme === false ) {
+				// broken xml OR no aliases defined
+				return array();
+			}
+
+			$ret = array();
+
+			foreach ( $theme->attributes() as $name => $value ) {
+				$ret[(string)$name] = (string)$value;
+			}
+
+			return $ret;
 		}
 
 		/**
@@ -616,4 +651,4 @@
 
 			return $this->Conn->GetOne($sql);
 		}
-	}
\ No newline at end of file
+	}
Index: core/units/themes/theme_item.php
===================================================================
--- core/units/themes/theme_item.php
+++ core/units/themes/theme_item.php
@@ -56,4 +56,32 @@
 
 			return $res;
 		}
+
+		/**
+		 * Returns full path to stylesheet file.
+		 *
+		 * @param boolean $as_url Allows to return url to stylesheet file instead of it's path.
+		 *
+		 * @return string|boolean
+		 */
+		public function getStylesheetFile($as_url = false)
+		{
+			$stylesheet_file = ltrim($this->GetDBField('StylesheetFile') ?: 'inc/style.css', '/');
+
+			$theme_path = FULL_PATH . '/themes/' . $this->GetDBField('Name');
+			$stylesheet_file = $theme_path . '/' . $stylesheet_file;
+
+			if ( !file_exists($stylesheet_file) ) {
+				return false;
+			}
+
+			if ( $as_url ) {
+				/** @var FileHelper $file_helper */
+				$file_helper = $this->Application->recallObject('FileHelper');
+
+				return $file_helper->pathToUrl($stylesheet_file);
+			}
+
+			return $stylesheet_file;
+		}
-	}
\ No newline at end of file
+	}
Index: core/units/themes/themes_config.php
===================================================================
--- core/units/themes/themes_config.php
+++ core/units/themes/themes_config.php
@@ -129,7 +129,12 @@
 											'not_null' => 1, 'default' => 0
 										),
 										'TemplateAliases' => Array ('type' => 'string', 'formatter' => 'kSerializedFormatter', 'default' => 'a:0:{}'),
+										'StylesheetFile' => array(
+											'type' => 'string', 'max_len' => 255,
+											'error_msgs' => array('not_found' => '!la_error_FileNotFound!'),
+											'not_null' => 1, 'default' => ''
-								),
+										),
+								),
 
 					'Grids'	=> Array(
 						'Default' => Array(
@@ -147,7 +152,8 @@
 								'Enabled' => Array( 'title'=>'column:la_fld_Status', 'filter_block' => 'grid_options_filter', 'width' => 200, ),
 //								'PrimaryTheme' 	=> Array( 'title'=>'column:la_fld_Primary', 'filter_block' => 'grid_options_filter'),
 								'LanguagePackInstalled' => Array ('title' => 'la_col_LanguagePackInstalled', 'filter_block' => 'grid_options_filter', 'width' => 200,),
+								'StylesheetFile' => array('filter_block' => 'grid_like_filter', 'width' => 150, 'hidden' => 1),
 							),
 						),
 					),
-	);
\ No newline at end of file
+	);
Index: core/units/themes/themes_eh.php
===================================================================
--- core/units/themes/themes_eh.php
+++ core/units/themes/themes_eh.php
@@ -132,6 +132,25 @@
 		}
 
 		/**
+		 * Validate entered stylesheet path.
+		 *
+		 * @param kEvent $event Event.
+		 *
+		 * @return void
+		 */
+		protected function OnBeforeItemUpdate(kEvent $event)
+		{
+			parent::OnBeforeItemUpdate($event);
+
+			/** @var ThemeItem $object */
+			$object = $event->getObject();
+
+			if ( $object->GetDBField('StylesheetFile') && !$object->getStylesheetFile() ) {
+				$object->SetError('StylesheetFile', 'not_found');
+			}
+		}
+
+		/**
 		 * Set's primary theme (when checkbox used on editing form)
 		 *
 		 * @param kEvent $event
Index: themes/advanced/_install/theme.xml
===================================================================
--- themes/advanced/_install/theme.xml
+++ themes/advanced/_install/theme.xml
@@ -1,5 +1,5 @@
-<theme>
+<theme stylesheet_file="platform/inc/styles.css">
 	<default_design>platform/designs/general</default_design>
 	<form_design>platform/designs/form</form_design>
 	<form_thankyou>platform/thankyou</form_thankyou>
-</theme>
\ No newline at end of file
+</theme>
Index: themes/advanced/platform/inc/styles.js
===================================================================
--- themes/advanced/platform/inc/styles.js
+++ themes/advanced/platform/inc/styles.js
@@ -0,0 +1,48 @@
+// The set of styles for the Styles combo
+CKEDITOR.stylesSet.add(
+	'portal',
+	[
+		// Block Styles
+		{ name : 'Alex Blue Title'		, element : 'h3', styles : { 'color' : 'Blue' } },
+		{ name : 'Red Title'		, element : 'h3', styles : { 'color' : 'Red' } },
+
+		// Inline Styles
+		{ name : 'Marker: Yellow'	, element : 'span', styles : { 'background-color' : 'Yellow' } },
+		{ name : 'Marker: Green'	, element : 'span', styles : { 'background-color' : 'Lime' } },
+
+		{ name : 'Big'	, element : 'big' },
+		{ name : 'Small'	, element : 'small' },
+		{ name : 'Typewriter'	, element : 'tt' },
+		{ name : 'Computer Code'	, element : 'code' },
+		{ name : 'Keyboard Phrase'	, element : 'kbd' },
+		{ name : 'Sample Text'	, element : 'samp' },
+		{ name : 'Variable'	, element : 'var' },
+		{ name : 'Deleted Text'	, element : 'del' },
+		{ name : 'Inserted Text'	, element : 'ins' },
+		{ name : 'Cited Work'	, element : 'cite' },
+		{ name : 'Inline Quotation'	, element : 'q' },
+
+		// Object Styles
+		{
+			name : 'Image on Left',
+			element : 'img',
+			attributes :
+			{
+				'style' : 'padding: 5px; margin-right: 5px',
+				'border' : '2',
+				'align' : 'left'
+			}
+		},
+
+		{
+			name : 'Image on Right',
+			element : 'img',
+			attributes :
+			{
+				'style' : 'padding: 5px; margin-right: 5px',
+				'border' : '2',
+				'align' : 'right'
+			}
+		}
+	]
+);