It could also be pal related issue too if you'd take that into consideration. I don't really have problem with FF games and i'm using windows vista too. Just how long does it takes for you guys to get crash and where in the game?
__________________
Intel Core2Duo E6300 1.86Ghz L629A244 @ 3.78GHz
Asus P5K-E Wifi/AP Rev.1.02g
Thermalright Ultra Extreme 120+ FM121 (110 cfm fan)
ATI x1900 GT Rev.2 256mb 513/657
G.Skill 2x1gb Hz--540MHz
CORSAIR CMPSU-1000HX 1000W