All CMB1 graphics are in a low-res mode.
So, a Hi-res card would be interesting if you replace them by hi-res graphics. Fortunately, many mods exist that provide Hi-res graphics. Of course, not all graphics have been recreated in Hi-res, but many of them, especially environment.
http://cmx1mods.greenasjade.net/mods
You just Have to replace old BMP files by new Hi-res BMP files. And as i did, you will rediscover CMB1 as a new game. Your game will be really enhanced !
Enjoy !
Idiots dare everything. That is the way to recognize them (Michel Audiard)