I downloaded and attempted to install the SP2 (actually, I have the 1st SP2 with the goofed logo) and I got the following error message from the installer:

"This patch package could not be opened. Verify that the patch package exists and that you can access it, or contact the application vendor to verify that this is a valid Windows Installer patch package."

Great! I'm running off my C drive.

I'll try installing on my home machine, but I'm not too optimistic.