And while I'm at the "ask the fellow DC members for software advice" game, here's another one: RAM disk.
Back on Win9x, I used a piece of software called "vRamDir" (now discontinued). It's basic idea was that instead of creating a fixed-size RAM disk, you specified some folder locations, and it would do what it could to keep the contents of those folders entirely in RAM; it was volatile in the same way as a RAM disk that files wouldn't be saved to disk (although it could use paging file in low memory situations). The advantage was that memory usage was dynamic.
I've never found anything like it for NT based systems
If something like this indeed doesn't exist, I'd like at least a decent RAM disk. I want to be able to add or remove RAM disks while windows is running (no reboot), and that's about it - but any additional features would be cute enough.
I used some trial version of a RAM disk once, but it seemed very hacky - for formatting it invoked format.com (slow, no progress bar), and it seemed extremely basic and had a pricetag that didn't match featureset...
Obviously I need 64bit XP support, since I've just installed that