The only issue I'm familiar with regarding XP is the problem of installing to AHCI from an XP boot CD, which may not have the drivers. The normal solutions are to supply the drivers from a floppy using F6 or slipstream them onto a new XP CD you burn yourself.
There's an even easier way - boot from the Vista or Win7 install DVD and partition the drive from the drive selection menu, but don't bother installing.
I have access to a floppy drive so that should be no problem. I could slipstream the drivers with something like nlite, but it'd probably just as easy to crank out ol' faithful..
After some reading, i see what you mean, that you can back out of a 7/vista install after creating the partition.. I see one small issue with doing this with a win7 disc (as I'm planning, or could possibly get my hands on a vista one) - that is, win7 RTM seems to create an additional partition no matter what - i don't know if you can delete this or not... may mess up things.
With these complications, I'm wondering if it simply might be easier/more guaranteed to just piggy back the X25-V it to my current win7 install; that way i can run the SSD Toolbox and run a full diagnostic before drive commission, then partition it.
If you don't mind hooking it up to another machine, go ahead.
If anyone is interested, there are a couple of workarounds to the Win7 100 MB partitition:
1. Delete the 100 MB partition and extend the other partition to include its space.
2. Instead of using the GUI, type SHIFT-F10 for a command prompt and use diskpart.
Search for windows 7 100mb partition and you should be able to find details.