Powerbook maximum memory

I want to put a lot more ram into my g4 titanium powerbook i already have 1 stick of 512 in it i heard u can get up to 2 gigs in it but all i can see is one gig if anyone knows where i can get the maximum memory would u please let me know and i dont know where to find the second ram slot in my computer i know there is one underneith my keyboard that is totally visable and was wondering where the other one is .thanks a lot

You can olny install 1Gb of memory on a Ti powerbook. That would be two 512Mb chips. You should be able to access both chips under the keyboard