Xwiki customize templates

[Josh Joy]

Hi,

I'm looking to use xwiki, though would like to do some
custom skins and 
templates for my site. I was looking at the various vm
files under the 
"templates" directory, though am becoming horribly
confused as to the 
flow, page life cycle, and generally how everything is
connected.

Is there some good resources I can read about how
everything fits 
together and also possible some sample applications?
I'm not really sure 
where to start or even how the main page for xwiki is
being 
generated...I tried looking through the xwiki website,
though 
customization documentation seems sparse, though I may
have just totally 
missed something...thanks in advance...

Thanks,
Josh