Aye, that's the rub for sure... and I wouldn't want to render my daughter "bootless" now would I?
I thought about trying to install over a network from my machine, but I have a G4 MDD dual 1.25, and I don't think that install disk would work on the i-mac, and well, you know, the license, etc...
And I would have to do it over an airport network (gee, that could be a ton of fun to do that, huh?)
She should definitely have a boot disk.