I just found out my hard drive is just about shot in my iMac G5 and I need to replace it. Apple has what looks to be a pretty detailed set of instructions for replacing a hard drive and I am curious if this is something I can do myself to save $100 or if I should have a professional do the install. I have not purchased a hard drive yet and am also a little unsure of what kind I need (current HD is 160GB) or where I should get it from. Any help or suggestions would be greatly appreciated. Thanks.