I cant get it to run! Keeps telling me " Couldnt find data folder " whats going on? I SOOOOO badly want to play. . . . . I mean race!

Can someone help me! ! ! ! ! !

Where did you d/load the demo from?
Did it extract and install correctly?
Have you tried it again (the install, I mean)?

It sounds like you're opening the zip file and double clicking the LFS.exe file. You need to extract everything inside the zip file to a folder somewhere and then run LFS.exe