The title tells quite well the problem I have. I ordered more memory from crucial but now I have a problem. I see 2 options without removing the entire back of the computer. The model I have is Powerbook G4 1.25Ghz. 1) If I remove the battery I find a door 2) There is an other door under the computer (in the middle). Which one is the one I need to open to uprgade my memory ? I do ask this because the I need to purchase new tools if it is the option 2.