After verifying the hard disk repairs, I removed one big chunk of packaged software that I wasn’t using and had a CD for reinstall if I needed. I was concerned about not having enough free disk space to continue the install. Then I put the upgrade disk in, switched my boot disk to my OS X partition, and rebooted.
Sure enough, the installer came up and told me that I needed to insert Install Disk 2. As I write this, it’s finishing the installation of the additional applications.
I think I dodged a bullet.