To clarify, that is:
64mb or 128mb base memory soldered onto the board
AND:
1 SO-Dimm memory slot.
You can access the memory slot by:
- Power off
- Lift up the keyboard by sliding back the tabs next to the 'esc' and 'f12' keys. You might have to unlock the catch between the 'f5' and 'f6' keys by giving it a half-turn with a small screwdriver.
- Underneath the keyboard is the mounting for the Airport card. You can remove the screws on this plate to access the memory slot. There is a diagram on the under-side of the keyboard.
Also, its fair to point out that I've seen a lot of people on the boards who have encountered trouble due to buying super-cheap memory. Get a warranty, or at least use a reputable source.