I asked the Apple rep at a store how much memory I could put on this laptop. The answer was 2GB. I'm developing numerical models that require lots of RAM, and the O.S. takes about 1GB. So I was thinking about doing a laptop upgrade.
The kit I got for doing the HD replacement was useful, as the screws are very small. I experienced absolutely NO difficulty with this "operation".
The instructions were clear. There isn't any more advice I could give.
PC2-5300 2 GB RAM Chip
PC2-5300 4 GB RAM Chip
MacBook Pro 15" (Model A1226) Hard Drive Cable