It looks like the info is listed under the technical problems section of the wiki. It basically says to check all the options under Hardware Limits (caps bits) except emulate Other DX8.1 caps. Personally I only have the pixel shaders and the max. sim. textures checked.
There's a program called 3DAnalyze that can get the game to show the textures. I think there's a link on the wiki that has more info on what settings you should use for it.
You could always switch to tactical view and play there. Just zoom out or lower the tactical zoom setting to a smaller number. The graphics get replaced with icons and the game works pretty normally, with a few minor annoyances thou. It's how I play most of my larger games on my old laptop.
