Jean-Paul: The iBooks (as well as the Ai's & Ti's G4's) are not very upgradeable. The ram is easy, as well as adding an Airport card. The hard drive is also user replaceable if you are comfortable in doing so. The processor is soldered on the motherboard, so this cannot be upgraded and the optical drives are difficult (although, not impossible) to change out. Best Regards, Wayne Schneck Marketing Manager FME 800.327.5676 wayne at fme.com