I just got my iBook back from having its hard drive replaced.... I don't have my Tiger disc anymore (my brother has it) and would like to get the ibook updated to tiger. I DO however have my iMac G5 disks that have tiger on it. But when I try to install it it says that these discs cant be used on that computer. Is there some way around this? Can I somehow use the imac G5 discs to install Tiger on an iBook?