yo idk but no offense it might bet time to upgrade the whole computer may b pick up a g4 off ebay or something? or get a refurbished macbook because even after adding a 1gb or ram and 60gb hd you still wont even be able to watch youtube videos i have a g3 ibook and its 600mhz 640 some mb of ram and a 30gb hd and its 5 years old and it cant even watch stuff of utube
The major memory suppliers (crucial, etc.) tend to have 'compatibility charts' for memory. You might have better luck confirming it on a site like that, or hope that CanadaRAM is around today.