I'm in desperate need of a mac pro, but I'm holding out for an update so what can I do in the meantime to maximize the performance of my PowerBook? My primary use is Photoshop CS3. I work with a lot of RAW images. Here are the stats: 15" PowerBook G4 1.25 GHz PowerPC G4 1 GB RAM 80GB 4200rpm HD ATI Mobility Radeon 9600 64mb vram OS X 10.4.11 Ok, obviously the first thing to do is max the RAM. That's only 2 GB, though so I assume I need a scratch disk. What is the best option for this? Any other suggestions for improving performance?