What? I thought we were just talking about a 32-bit restriction here? A 32-bit XP (or vista) system with 4GB will read as 2.5-3.5GB of ram once you're booted up.
Saw this great article about using the RAM that windows XP can't. By nature, the 32 bit OS is limited to ~2.5GB of RAM, so if you have 4GB (or more than 2.5) installed, it's not being used. RAMShop allows you to allocate that unused RAM as a RAM disk and let photoshop use it as the swap disk. Much faster than traditional…