I came across the Gavotte Ramdisk Utility today when googling if it was possible to get XP to use more than 4GB of RAM. While you can't (unless you have SP1 and enable PAE), you can still make use of otherwise unaddressable RAM with this utility because it can access RAM over the 4 GB barrier, even with a 32-bit O/S. On my new system with 16 GB I occasionally will need to boot into my old XP install. XP can only see 3.42 GB of the 16 GB. With the Gavotte Ramdisk Utility I can make a 12.47 GB ramdisk. I can then enable the pagefile and place it on the ramdisk. XP will only let me make a 4 GB pagefile, but using 7.42 GB of RAM is better than using 3.42 GB. I also at the same time solve any issues which might arise from not having a pagefile. Since I have lots of free space on the ramdisk, I'll probably place my browser cache there as well. I highly recommend this utility to anyone who might be dual-booting a 32-bit O/S on a modern system with > 4 GB RAM.