Where is the template for categories?

[acidburnz]

Lol, you're just beating bout the bush ain't ya XD

Again:

Okay lemme make this a bit clearer.

1. Go here: http://www.uwstudios.com/forums/
2. Notice how

Mechnet Online - Sub-Forums: Announcements
Search For Celestia

have the same gradient bkg as the main category headers?

3. How do i change it so that they don't, and i can separately style the above said sub-category listings

I'm assuming I have to go into the template that deals with listing the said sub-categories, add my own css id/class as apposed to using the same one used for the main category headings. What i'm asking is where this template is exactly.