It's exceedingly easy to install. All you need is your fingernails and a small, phillips jeweler's screwdriver. The instructions are on the underside of the keyboard, infact. But here's my brief version..
Power off the iBook, remove the battery.
Lift the keyboard up and set it down on the handrest (Instructions should be visible now)
Remove the Airport card
Unscrew the 2 screws holding the coverplate in place. Use the lock down handle to lift the plate up. The Memory socket should be visible now.
Align the memory correctly with the notch and tab, and then insert it as far as it will go (not too far) and then press it down so the two tabs on either side of the memory will snap into place.
Replace the cover plate and tighten the screws.
Replace the Airport card, attach antenna, lock it in place.
Replace the keyboard.
Replace the battery
Power on. Voila! You're done! Should take you no more than 10 minutes. You can check to see if the new Memory is recognized properly by clicking the Apple on the upper left and going down to and clicking on About This Mac..
~Dak