Does anyone have experience running Mac OS 10.5 on an iBook G4 1 GHz? I am updating a family members' machine. I already plan on maxing out the RAM at a wonderful 1.25 GB, :-/ and changing the Hard drive to a 160 GB 5400. Will it be too slow using 10.5? Should I go with 10.4 instead? Any opinion would be helpful. Dave McLaughlin