xfwm4 theme howto or spec ?

[Ylosar Goer]

Hi,

I just (sort of heavily) modified the b5 theme to make windows look like 
i always wanted them to :) , but i would like to read some documentation 
about what could be done and how it should be done (i am not sure about 
the way i did my modifications, even if they seem ok).

So, could someone please point me to a relevant source of knowledge 
about xfwm4 theming ?

--
yP