<< Does the radeon help the gf3ti200 when you play games at all? >>
No.
When I play games the secondary monitor basically becomes useless (can't access it at all) so I useually just disable it before starting a game.
I have heard that some people are able to use their secondary monitor for multitasking during games but I usually need 100% of my attention to play the game! So I really haven't looked into seeing why my secondary display won't work during games.