You can do a
Custom install from your 10.4 disc
Thanks for the input, the trouble is that I only have the 10.3.5 disks that came with the iMac new. Everything else has been done through Software Update. I tried to grab it from that disk, and the installation begins and then quits on me. I'm guessing it's because the newer OS won't accept that version of Safari.
Oops! Wrong again on my part. I do indeed have the 10.4 Tiger DVD. Just had it stashed in a different spot than the rest!
Thanks again!