Please Help. I was trying to install a new Pioneer DVD Burner 112D into my G4 MDD in the bottom optical drive bay and everything seemed to go fine except the face of the drawer can't eject because it's a hair to high up on the top left and top right corners. The rounded opening apple leaves you is catching the top left and top right corners of the drawer and I can't seem to figure out a solution outside of chopping up the face of the drawer with a knife which I'd rather not do. What do I do? Also, when I booted up with the new drive it only recognized the new drive and not the old one anymore. I don't mind the new drive being the primary drive but don't know how to set the jumpers on the new and old drive so that the new drive is primary and old one is secondary. That is if I can even use the new drive and don't have to ship it back. Why can't apple just make things easy with stuff like this? Please help.

Dunno about the button thing but you might of disconnected the old drive or didn't set the correct jumpers for the Master and Slave.

take the face off the front of the drive.

You only need to take the front off the drawer. Not the whole thing.

The Face unsnaps from the draw.

I have 2 Pioneer 111 in my mdd and I simply popped the front panel off the drawers with a butter knife.  they will easily snap back on if you ever need them again.

one more thing.. 

make sure the drawer is open when you take the front off.  you can't really access the seam you need to pry apart with it closed.

cool. thx! so how do i set the jumpers correctly? and do i hold down option + eject to access the secondary drive?

just activate the eject menubar item within osx

http://www.creativetechs.com/tips/quicktips_51.html

all pioneer drives list the jumper settings on the back

Jumpers should be set to slave according to the instructions on the drives label. Unless your top drive is set to Cable Select, but they are usually set to Master.

Option eject does work for your second drive, or as I'm sure the above link says, you can install the eject menu item by going to /system/library/coreservices/menu extras and double clicking the eject.menu file to launch it. Should then see an eject icon appear up by your clock.