I have problem also with MTW+VI+XL mod (XL mod is not problem). When I installed Catalyst 5.10 I coudn't play any more (before that I have 5.4 and worked excellent) as battles have 3-6 framerate. Now I use Omega drivers, but game always go out into WinXP after 30 min or less (thanks God, there is quick save option). Graphic card is Radeon 9800pro. My friend have aplsolutely the same problem and he have Radeon 9600pro.