Installation failed when attempting to reinstall MySQL in OS X 10.6.6
This might be a little late, but Homebrew for Macintosh is a stellar way to install software such as mysql. There is information on the their wiki on how to install and then once brew is installed, it is just brew install mysql in your terminal window.

Good luck!

Update: DOH. I fail at reading. Problem already solved. Anyway, for people in the future, if you have trouble installing mysql, give brew a try.