Hi, my iBook G4 (Tiger) has been acting a little wonky, and a genius recommended that I backup to my external hard drive, then erase and restore the hard drive using the original system disks. I have two questions about this:

(1) I have the original install disks, plus the Tiger. I had subsequently upgraded to iLife '06, but I have misplaced the upgrade disk. If I re-install all of the system disks, am I only going to get iLife '04? What will happen to the files I have created with iLife '06?

(2) Is there any instructional post somewhere that can walk me through restoring the data? I have a LaCie backup drive.