Another MTW fan here! I don't play it as often as I used to, but it still remains one of my 5 favorite games of all time. The XL Mod is my favorite as well, although I also enjoy Hellenic TW and Samurai Warlords. Good times, good times....
As for the problem(s) getting MTW to run on newer graphics cards, the main culprits are the Nvidia 8xxx and 9xxx series. There are solutions and/or workarounds for a lot of these cards, but you often have to dig a little to find them. (And good f****** luck if you have an actual Nvidia 8800. For whatever reason, that particular card doesn't allow you to run MTW at all, no matter what you do.)
Often times, the best option -- other than to stop playing MTW altogether -- is to switch to another video card. A lot of people seem to have had success with the ATI series, although I can't personally vouch for them (I have a somewhat older XFX card which is no longer manufactured).
< Message edited by martok -- 3/5/2010 3:59:11 AM >
"Evil is easy, and has infinite forms." -- Pascal