Hello I am new to this site. I just purchased a G5 tower from craigslist for $30 but it doesnt have the OS installed. I downloaded 10.5 and put the DVD in and tried holding down "c" so it would boot from the disc. The machine read the disc and spit the DVD out. I have tried many different versions of OSX but the machine keeps spitting the DVD's out. I finally called apple and talked them into sending the the system restore disc (for free) and am waiting for that in the mail as we speak. I was curious if the disc apple sends me gets ejected without loading can I just replace the super drive with any other DVDRW drive or does it have to be a superdrive. Also any suggestions on why my other discs wouldnt work?