I have a PowerPC G4 1.42GHz Mac Mini with 1GB of RAM and a 80GB HD. I was wondering what can I do to make it faster, and last another 3 years for less than $300? I was thinking that I could switch the Hard Drive from a 2.5'' 80GB to a 3.5'' 500GB or 1TB Drive. All I would need is this thing right? Would this help it out at all? What are other modifications that I could do to my MacMini? I've heard of switching the CD/DVD Drive to a Hard Drive, haven't seen thtat anywhere though.