I have always felt that Spring Cleaner, and its derivatives, was one of the most dangerous pieces of software out there.
Probably the best solution here is to put that CD back in its packet, stick it in a drawer and forget about it. Meanwhile, I would suggest that you dig out the OS X installation disks and do an Archive and Install to repair the damage done by Spring Cleaning.
If you are running OS X 10.6.x, then the default re-installation is an Archive and Install. Make sure you Preserve User Settings.
For OS X 10.5.x and below, the installer should give you a warning and tell you to change the installation options. Once again, choose Archive and Install (Preserve User Settings)
Let us know how you get on
Have a iMac, intel based. Recently downloaded latest version of SpringCleaner. Used it to clean up unused disk space. Now Internet is connected. Can even check email with Mail, but no pictures in the emails. Safari just keeps loading with no results. Can't access internet with anything. Ran disk repair. Even turned off firewall. No luck. Not my router, my Macbook is working fine. Getting very frustrated, CAN ANYONE HELP????