I installed a GIGABYTE i-RAM SATA Drive, it's a Hardware RAM Disk used with 4 x 1GB DDR400 PC3200 DIMM's (sold separate). I use it for the XP's Paging File to help speed things up a bit. Works pretty good. I noticed that programs load quicker and shutdown better than before. The RAM Drive acts like a Virtual RAM Disk, but it does not suck up my system's RAM in the process. It has greater speed than a normal Hard Drive, especially in random access. Using Performance Test 6.1 I got these results as compared to my C drive:

Sequential Read

C - 45.0  MBytes / Second
G - 100.  MBytes / Second

Sequential Write

C - 45.0  MBytes / Second
G - 75.0  MBytes / Second

Random Seek + RW

C - 3.00  MBytes / Second
G - 80.0  MBytes / Second

As you can see, the Random Seek went way up, almost 27 times faster. The RAM Disk also has a battery backup, so when you power down, the data is still there when you boot up. I mainly use it for the Paging File, but it could be used with other Apps as well. I picked mine up at Amazon along with the memory. Check it out at Amazon, GIGABYTE i-RAM.