So I've been passed an old ibook to see if I want to switch to a Mac. it's an ibook 12" G4, 1.33Ghz with 512k RAM and a 40GB hard drive and runs Tiger. The HD seems okay, but the battery is shot - lasts for about 30 minutes. I've checked the serial in the battery upgrade programme and that's been done. It seems to me, it might go another year of useful life if it had additional memory and maybe an upgrade to Leopard. But before I commit money to the project, do any of you have any advice on what else to check on the machine, and how to go about it? Crucial RAM for this model is a bit expensive for what it is, and Leopard seems tricky to get hold of.