Bugger. Do you have any PPC install discs?
Mate, it might be time to tell your friend to invest in an OS disc. The latest and greatest Tiger isn't necessary. Panther is pretty cool, and will be much cheaper on eBay.
Not that I know of. It shouldn't matter anyway because you'll need a retail version of OSX to ensure it works. In other words, get a copy that didn't come bundled with a machine.