I got this mac that has OSX 10.3 installed on it. I recently wanted to install good ol' Starcraft again (an OS9 game), but found out that Classic wasn't installed. When i pop in the OSX install CD's i can't choose 'upgrade' in the installation menu because i ran a couple of updates and the current version on my computer is higher then on the CD. Is there a way to install Classic on it without having to format everything?