Did you review any of these links?
http://www.google.com/search?hl=en&q=iBook+G3+Disassembly&btnG=Google+Search
Pictures and more seem to be available.
Bob
So today my friend dropped off his old G3. It's a white, dual-USB model that should have a 600Mhz CPU. It doesn't have a battery, but he found the charger, so I have a power supply to work with here. However, the hard drive is shot.
Basically, I just need a new drive, good instructions on how to dismantle it, and if I can, replace the casing and get some new rubber feet for the bottom shell. It should work with just a new drive, but the casing is beat up, and the keyboard is faded in quite a few areas. Anyone have any goods suggestions? I think I may have found some good instructions, but I don't want to use those in case there are better versions. Comments appreciated.
-BMF

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic