Here is where to get a more detailed take apart manual, for free: 
Powerbook Medic -  http://www.powerbookmedic.com/Take-Apart-Repair-Manuals-p-1-c-258.html

REplacing the keyboard on this model requires removing the top case, disconnecting the ribbon cable from the logic board and extracting the keyboard from the top case. Make sure you remove the battery from the computer first. You will need a jeweler's phillips and a torx 6 for the top left and right torx. It will require for you to peel back the mylar and backlight cabling ( if your Aluminum has a backlight keyboard )

Before doing this thought, i would try resetting the PRAM and NVRAM.


http://docs.info.apple.com/article.html?artnum=2238

Keep me posted if you have more questions on this.