Hi forum, I am running my old PowerBook G4: PowerPC PowerBook G4 on OS 10.4.11 (Tiger) 512 MB DDR SDRAM 1.67 GHz PowerPC G4 I need to know: 1) These are the upgrades I plan to do, in light of losing my MacBook Pro to a library thief: - upgrade RAM from 512 MB to 1.5 GB (Or do I REALLY need to replace both to max out at 2 GB?) - upgrade to OS 10.5.x (which is best? I know G4s work best with Tiger, but am willing to sacrifice speed for better compatibility in Leopard) - insert CardBus adapter card for a four USB (2.0) connection (is there something better I can use for this slot? It already has two (2.0) USB slots) 2) Why won't my PowerBook read a 500 GB Toshiba external hard drive? It was formatted with my MacBook Pro (10.6.3), and read on a MacBook (White MacBook running 10.5.x (don't know specific OS), but will not read on Tiger. Is there something I can change so it will? 3) I can't find my Disk Utility anywhere - what can I do to get it back? Will it appear if I upgrade to 10.5.x? I just don't know what happened with this one! 4) I have heard of people losing the backlit function of the keyboard when upgrading to 10.5.x from 10.4.11 on PowerBook G4 - what can be done to avoid this? 5) Where can I legitimately buy Apple OS install discs for a PowerBook G4? Thanks for any information you have! I can't afford a new computer, but might be able to make this one better!