I've never owned an iMac, but for the several other Mac computers I use OWC has been an excellent supplier of parts. At the bottom of the page is a link to installation instructions.
Replacing Optical Drive on I-Mac G5
Has anyone replaced their optical drive on their I-Mac G5. I need to replace mine due to problem burning disc. (sound issues, fading, muffled sound, etc.) Has anyone tried a aftermarket Optical Drive or should I replace with the original apple Optical Drive. Any input would be much appreciated. Thanks