Aspire One: Installing and Running Windows XP
 

After all this hard work, you are rewarded with a very fast installation of Windows XP, that actually outperforms Ubuntu in day-to-day tasks. Sleep and wake cycle is faster, it boots faster, applications load faster, and it leaves more memory for applications (with no applications running, over 300MB of the 512MB are free). I never could have imagined Windows XP running better than Linux on this netbook. I have really proven myself wrong.

It was a lot more work than installing and tweaking Ubuntu, but now that I'm done, I'm extremely happy that I did. My netbook is more functional, faster, more responsive, and has less hickups and stutters than while running Linux. I know this is something some of you might not like to hear, but it is a fact for me. Of course, as always, your mileage may very, especially on other types of netbooks with different specifications.

http://www.osnews.com/story/20251/As...ing_Windows_XP

This is the guide he followed to get XP install onto a USB stick: http://www.boot-land.net/forums/?showtopic=4900