Hey. I've had the same problem in the past, but then I got a new computer for myself. I have no clue if that's even possible though. You could probably try the micro$oft website. It might be possible on XP professional, but yet again I'm not so sure.
Here you go. I used different dimensions then the ones specified because I usually made my backgrounds in this size. I also think the big box might be off a little but I don't know. PS: I'm not really good at photoshop but I gave it a try.