Styles vs. Templates vs. my head is hurting

[Froberg]

Right.

So I am hosting a forum for a gaming clan, and we of course want to give them a specific sub-forum design and a different logo.

So how is it I can do that?

I downloaded some styles, and the ones that looked the best were set to replace buttons as well - which would mean I could only have one style available.
I want like 2-3 different styles, 1 dark, one light and one for this clan.

So how would I go about doing that, when different buttons should be available as well?