Skins can be uploaded/updated by a zip file. This zip file will replace the entire contents of the skin with the specific name. The existing directory will be expunged before installation, so updates will not "add" archives, but rather "replace" the entire skin.
Skin zip files has the following rules concerning its contents. All files that not match these criteria will be ignored. The skin manager will silently ignore these files, these files will also not be stored in the archive.
A typical layout of zip file is:
|portal.css||css||The portal stylesheet|
|tool.css||css||The stylesheet for the tools|
|images/||directory||The image directory|
A skin may not contain: