Hi guys. I am currently using a 15" powerbook G4 1.67 Ghz 1.5GB ram. I have been trying to find some information on upgrading and speeding this machine up and any help would be very much appreciated. What sort of things are possible? HDD, Ram? I am intending on saving for a new MBP but I also own a early 08 Mac Pro and was wondering if I should just put money into upgrading that beast and put a bit of money into the powerbook and continue to use that as my portable. I use the laptop mainly for general web and movie stuff, but also use the laptop with Guitar Rig 3. I'd like to eventually get a smaller, lighter portable machine but if it is possible to perform some system upgrades on the powerbook, it would be a good money saver for the time being and continue using it. Thanks in advance for the help.