[Stuntman Steve]

To get my Logitech mouse's and trackball's wheel to work in MOH (both demos) and RTCW, was to download the lastest mouseware drivers off Logitech's website. Install them and go to the mouse properties window and click on the buttons tab. And make sure the "Use MS Office compatible scroll only" and "Scroll in active window only" are checked. This got the wheel to work for me. I tried the gamewheel fix they had before this and it didn't work in any game really well.
Hope this helps.