How could I use my racing wheel pedals in other games?

This should be able to do it: http://glovepie.org/glovepie_download.php

I used it to link a nintendo wii controller to a pc a while back. Its basically a bridge between any sort of input device and a pc. You tell it how to interpret different commands it receives from the device. Exceptionally versatile. Will take a little time to figure out though.

Don't let the enviro/political ramble on the site throw you off. It really is a pretty good product and its free.

If you're on OSX, you can try Joystick Mapper. I've successfully mapped input from a Logitech Driving Force wheel to keyboard output.