Update:
I made a mistake. I assumed that when I deselected the "clean install", that it would do like it said and install on top of the existing file structure on the partition.
It didn't. It reformatted the partition. :-/
I didn't have anything vital on there, but it was annoying, since it was an original "restore disc image" for the iMac G4 that had iMovie and iDVD on it. (Now I'll have to hunt down that disc again.)
But, it boots and runs juts fine. I like that it has a recent Classilla already loaded!
Other problem: The image does *NOT* have GeForce MX4 drivers! (That's the problem with this model of iMac - it was very short lived, the next model was OS X-boot-only, with the same specs. So OS 9 drivers for the GeForce MX4 were only in the one restore disc set. That's the other problem I have - my restore disc is for the slightly older 15" model, which has MX2. I know I had gotten the MX4 drivers from somewhere, I just can't recall where! That's one of the reasons I'm annoyed it completely overwrote the partition.)
Now to get a copy of OS X 10.1.4 that boots properly. (Just like 9.2.2, it had a custom-just-for-it 10.1.x, since it was the only GeForce 4MX system before 10.2 came out.)