These triangles you see are called Artefacts. I have only ever seen them appearing when I over tweaked my card. The definition of an artefact is an 'An unwanted visual aberration in a video image.' Basically it means something 'aint working as it should be. Two things come to my mind, and that is have you overclocked the card, and is you card running overly hot? That could knock it over the edge a little. The only other thing is drivers - check Guru of 3D for drivers, they usually keep old ones up.
Dan

Before I reinstall directx, I reiterate that the card works totally correctly with IL2 and all the aircraft that come stock with the MS flight sims and with about half of the add on aircraft. All of the aircraft run perfectly with the old 16mb pci Voodoo card. I was thinking there might be an incompatibility between the nvidia driver and maybe a drawing program used to make many add on aircraft. But it sounds like no one else has this problem? I guess the quick thing to do is reinstall direct x and then maybe download the latest video driver.

Jimski

Re-installing directX will have no adverse side effects and may help, the latest version is 9.0c I believe.

I found that driver 43.51 gave good results in cfs2 using a GF2 mx400 in win98.

I used to have exactly the same problem in cfs2, and it was resolved from time to time as it recurred, from either directX or driver re-install, I just can't remember exactly now.

You say IL2 runs fine, I'm using IL2fb with current updates and I get good frame rates but I can't increase the settings to the way I would like them, despite my FAR SUPERIOR CARD to your's. So, Wow!

The GF2 MX400 is an absolute dinosaur, it wasn't even any good when they first came out many years ago!

Seriously consider upgrading to video hardware that is a bit better than relics from the past, especially if you are going to continue an interest in flight simming. By using that video card, you are seriously limiting your simming experience.

I found that it took a minimum of a GF4 TI4200 8x AGP video card to display CFS2 adequately and at the correct resolutions to be competitive at higher levels of online play and to display addons without problems.

IL2 (FB current version) will use just about any resources you can run it with, so you just can't get enough power.

CFS2 uses a similar aircraft format to FS products.

Main differences are model and texture type support as the sim versions become more seperated by time of release.

If you see all white textures, then you are just seeing the skinned model and the textures aren't showing because the file format can't be read. It's only paint. 

Model incompatibility causes animated or other parts not to show, or possibly the aircraft may not be recognised at all.