I'm revamping my 3 year old 15 inch G4 Powerbook in the hopes of getting a year or two more out of it before replacement. In addition to a new battery, I'm going to put in a 160 GB hard drive. I was originally planning on moving the 80 GB to an enclosure to use for storage, but then I had another idea: can I move the 80 GB drive to my G3 Pismo and use it as is? The Pismo HD died a few months back, so it is currently sitting collecting dust. I think the drive itself should work, but will it boot on a G3 straight after I pull it out of the G4? In other words, is the system software on the 80 GB going to be G4 specific, or will it work on the Pismo? It would be sweet to have a clone of the G4 (with my iTunes library and iPhoto library and all my apps) running on the G3 without having to do a reinstall... Let me know if you think it will work or not.