Grahical problems while running the mods for the demo

[Ahiga]

I'll provide photography soon, but I've been having errors with the graphics of the game while running the modifications of custom battles.

Scenes such as an entire unit turning black, and one very strange instance of an aztec warrior group turning 'transcluent' like, almost like when the Predator goes invisible in the movies. There has also been instances where the HUD gets iffy.

I'm wondering if anyone has experienced it before, since I've been having problems with my system already, and have games 'stutter', but without any relation to framerate (They just stop and start at random intervals), so I am thinking it might be my video card or my PC, or it may be the demo.

[Spart]

Haven't experienced any problems at all. It's possibly your video card, or video drivers.. Your system specs?

[Ahiga]

Haven't experienced any problems at all. It's possibly your video card, or video drivers.. Your system specs?

AMD 64 Athlon X2 5000+ Dual core
ASUS ATI X1900XTX
2 512-mb sticks of Corsair RAM, it's 667 something and something else for the thousand digit.
OS is on a rather speedy hard drive, forget the details.

This is a half-arsed detail because the information sheet which came along with this PC was lost, and I have been trying to find a way to get a replacement. But you can see that it's a really good system, which is why I am boggled as to why its having trouble in any games, and if that is the reason why MTWII is acting funky, or if it's because of the mods.