I just got a good price on a used PowerBook G4 with OSX 10.3.9 installed. I think this will make a good companion to my newer 20" 2.66 GHz iMac. I'd like to learn all I can about it before it arrives. Like possible software upgrades, any known issues, how I can reset the user name and password, etc. I was hoping t find a web site that I could enter the S/N and get all the base info like when built and basic technical data, but I couldn't find a thing in my list of Mac websites. My mail issues will be (I think) how to reset the username and password, can the OSX be upgraded beyond 10.3.9 and any known issues. It has 512 MB of RAM in 2 256 MB cards. Can this be upgraded and what type cards are needed? I happen to have 1 GB cards removed from the iMac but I suspect they will not work in a G4 PowerBook. If anyone can help with answers or a web site for the G4 PowerBook, it will be greatly appreciated.