i know there is a topic here who teach how to install a new theme for my forum i just dont know where so if someone could give me a link i will like that:P

and.. can someone maybe give me a good site for themes to dwonload for free and the kind that will work on my forum?

maybe you can search a forum a bit
there is an option search also
think about it

You should use the search option to find the topic that you want.

ok and what about a good theme site?

Sorry but don't know any sites for theme downloads. I would also like to know sites for downloading themes but I guess there aren't any so we should stick to the ones we have or simply upload our own images to customize it a bit.