I run Win7 in the garage PC that has 2G of memory. It may get more just to get these sticks off the desk though.
But here's a solution: Upgrade to Win7 AND get another sound card. I like the Asus Xonar, but in one machine we have issues with Skype, and that the only issue. Skype, in that case, wants to run in XP compatibility mode and still acts funky. In mine, I don't have this same issue so I don't know what gives.
However, we go back to the root question: Use the Creative drivers, keep XP Home, and not a dollar is spent. But if you do
move for an OS upgrade, you're informed of some issues.
Damn .. now that must be skirting the edge of usability. How well does it run?
Done that too, and it's still chugging along. I installed the beta's on an old rambus machine just to see what it'd do, and it really worked fine.
Then a buddy at work wanted to geek out and to stuff his old 512MB P2 box with all the OS's I liked, put the Win7 beta (which was ultimate in form) and it was fine too once the OS's were all working together. Oddly, and I don't get this, he bought my ultimate disk off me and is still running right here in the closet. He should really come by and pick it up, but oh well...I know his time is pretty much not dictated by himself.
But for sure, it's surprisingly spunky with low memory and AGP DX7 cards. Windows Premium, not starter, was on our clamshell and was responsive. Overkill, but just had to try it