I just finished hooking up the TV antenna to my stock car FM antenna and it works BEAUTIFULLY!
I don't get a perfect signal but it's good enough to watch the Lakers hehe
In detail this is what I did... i opened my head unit and soldered extension wires on the FM antenna jack to my TV antenna. And that goes into the my WinTV card. I didn't even need to add a signal amplifier. It works great as is!
I guess I am gonna have to do another update to my website...*sigh*