Hmmm...tricky thing with the newer cards and MTW. One thing that might work is reverting your drivers to Forceware 61.76 from
whatever you have now. If that's not possible, then I really can't pinpoint the exact problem.

IMHO, to avoid many problems, anyone who is serious about running MTW/Shogun correctly should try to get an older computer
and use a software setup that was contemporary with the older TW games (Win 2000 or XP, older drivers). Otherwise, the
old games will only get harder to play unfortunately.