I'm attempting to fix my friends old iMac G5 running OSX 10.4. There are a bunch of updates she needs, but she doesn't know her admin password. I'm attempting to reset it with her 10.4 install disc, but when I attempt to boot into it, the machine just runs and runs and runs and never seems to make it to the installation screen. I thought maybe it was the disc, so I downloaded an ISO of 10.4 and tried to boot into that, but that didn't help either. OSX seems to recognize the discs when I view it's contents in the folders, but booting into them just don't seem to work. Should I try booting from a USB version?
I wanted to show her what Ubuntu might look like (so she doesn't have to pay $200 for Leopard, the last version of OSX her iMac will support), but booting into that LiveCD fails too.