Unfortunately there isn't any documentation, and the code's in
a bit of a mess right now during the transition from the old skin
code to the new template-based skin code in 1.3.
+
+The following might help a bit though.
+
+The first file called is Skin.php, it will check various settings and create
+a standard class.
+
+Before version 1.3, each skin had its own php file to generate the output. The
+files are:
+ * SkinCologneBlue.php
+ * SkinNostalgia.php
+ * SkinStandard.php
+ * SkinWikimediaWiki.php
+If you want to changes thoses skin you have to edit the php files
+
+Since 1.3 a new special skin file is available : SkinPHPTal.php. It makes use
+of the PHPTal template engine and allow to easily split code and layout of the
+pages. The default 1.3 skin is MonoBook and using the SkinPHPTAL class.
+
+To change the layout just edit the phptal template : ./templates/xhtml_slim.pt
+as well as the stylesheets in ./stylesheets/monobook/ .