>I couldn't open up the limewire program.It tells me it could not >create the registry key.Please help!!!!!!!!!!!!

Can you access any of your data? If so, move it to another folder first. If not, can you just move all limewire & folders to disk?
Then redownload & set up limewire. Move your nonregkeyed copy back. Your old setup may piggyback on the new reg key. I had a heartstoping crash once, and was able to recover data that way. good luck!