AGP Texture Acceleration

AGP Texture Acceleration is greyed out in dxdiag and its stopping me from playing some games and ive done everything i can to enable it, from installing chipset drivers to downgrading my graphics to reinstalling directx, i dont know what else to do. my chipset and graphics card are, intel 845G chipset and radeon 9200 PCI version, if anyone needs this information. please help me enable it, i havent been able to play GTA:SA for about 6 months.

PCI or PCI-X?  Ah well, it doesn't matter.  The fact is that a Geforce 5 series is faster than a 9200, and the current generation of gaming cards has moved on to the 7 and 8 series.  Accept that, if you want to play any reasonably new game at a reasonable framerate, you'll be dropping the $$$ for a new vidcard and, maybe, a new mobo.

This time do research before buying "gaming" hardware.  And don't buy your shit @BestBuy or some similar ripoff retail location.