As a last resort use your start up disk & open disk utility there to both repair disk & permissions. Alternatively use Norton to fix but only version 8 (version 7 was rubbish!)

Double-click the harddrive icon, open the Library, open the Receipts folder, then find the file: Install LimeWire.pkg, delete it and try again.

Also see: http://www.gnutellaforums.com/showth...threadid=29131
Also: http://www.gnutellaforums.com/showth...threadid=24703 (Stief)

You could also try http://www.mager.org/LimeWire/ which is a beta version but doesn't require installation. But again, I think it's a dmg.