See this iFixit guide. Of course, they don’t really explain how to put your MacBook back together once you have it completely apart.
Actually, one thing that is very cool is this tutorial makes it pretty clear that putting in RAM or a new hard drive into one of these babies is easy. I managed to upgrade the RAM in my iBook (with much coaching and help from my colleague Steve Benninghoff), but I have been told that swapping out a harddrive in this machine is something an amateur does not want to mess with.
Just had my hard drive replaced in my iBook G4 – it finally died. $175 parts & labor, paid for by the good people of the State of Michigan.
:)