I just bought a Powermac G3 all-in-one from a buddy for $40. It has been upgraded to a 400mhz G4 through OWC (I think that how fast). I know it has a 40gig hard drive on it. It is also the model with both the zip drive and the floppy. It's also running a version of OS X on it. I bought it for my kids to play with. What things can I delete from this thing to make it faster? Like, the 4 year old won't need iTunes....how do I get it off of there? Would it be a little faster with an earlier OS?