Alright, so on my PowerMac G5, I recenlty installed some programs and backed them up to Time Machine. The G5 is running 10.5.6. However, the HDD just happened to fail, but I backed up to time machine... And here's where I tell the tale that the G5 was bought off of eBay, and the OS discs that came with it are 10.4.4! So, I assume I cannot use this with my 10.5.6 backup. Could I, or am I stuck buying a new copy of OSX from Apple or FleaBay?