UT2004 UnWheel: http://unwheel.beyondunreal.com/
Review: Installed. If you like driving environments, this is fun. Bit more geared to a younger crowd. I installed for my 7 year old. He loves it.
Warning: Thoroughly read the install instructions. I didn't. Typical.... The install will create a separate Folder in UT2004: UnWheel: Which contains all of the standard: Animations, Maps, Sounds, System, Etc...... Keep the UnWheel stuff separate. I didn't. It worked fine. Only problem is that when all integrated, they can't live without each other.
Anti Tcc does not like the file: Unwheelgui.uwgmenucar. Can't play online on many servers with this file. UnWheel is a well done, fun mod. Be careful on the install or be prepared to to a total UT2004 Uninstall; just like I did.