TV w/ ATI Radeon running RH8?

Got a relatively simple question, and hopefully there's a relatively simple answer.
I have an ATI Radeon All-In-Wonder video card, works rather swell in all the Windows OS's.
But I would really like to be able to utilize it's functionality while running RH8. Can
anyone give me some suggestions as to how I can get the TV tuner going in Linux? I guess
that is one of the more major functions I would like.....I can mess with the other functions
later if I want. But atm, if I want TV, I have to run Windows....and this is the only reason
I really need Windows now which is frustrating since I like Linux for my other things.

Thanks in advance for any help offered.

Digitalis