Xanga skinning help Options

[Clunky]

Hi was wondering if someone could point me to a tutorial on how to write a skin? I have been looking through some of the ones posted here but i'm not fully understanding it.

I'm very knowledgable with Xhtml and CSS (I work as a web designer), I just need a little on the basics of how this all works if there is a tutorial posted somewhere could someone post a link? Or if someone could just run me through the basics that'd be great.

Thanks,
CLunky