I'm still stuck on Figure 6. The drive wont come out & I have the latches open. What could the problem be??
It's been jammed in there at a slight angle I'd say. I know what I would do, but it's not my computer. Try this at your own risk, if Harry's suggestion via PM hasn't worked. These are pretty drastic measures.
Never mind putting your hand in there under the side of the optical drive, as per .pdf instructions. Make a metal L-shaped hook, about the same width as your hand. Then, pulling on that hook firmly, but not excessively, with one hand, insert a hard plastic wedge (like a cooking spatula) in various places around the perimeter of the drive and wiggle while you're pulling with the hook.
Next idea - turn the computer on its side, open area downward, with L-hook attached to optical drive and tied to some immovable anchor point, and pull the whole G5 body away.
Left field idea - if you can somehow wiggle two or three pieces of strong cord, or a wide leather or fabric strap, under and around that stubborn drive and have someone else hold the cords/strap, pull the whole G5 in the opposite direction.
Failing any or all of the above, I think it looks like a total dismantle job, much or all of which you could probably do yourself.