Okay, lets see about this one

As you're moving to XP, try this:
Control Panel \ Administrative Tools \ Event Viewer.
Look at the date and time (you're looking for a X or!), and then rightclick and choose properties. What's in the Description?
If you don't have the tools, tightclick on the taskbar at the bottom. Properties \ Advanced. Tick the box, and they'll be in the Start \ Programs list.
Also, when the error comes up, can you see which file it is in the process of installing? You may not, so that's okay

Also, see if you can find this file:
FPMsiLogXXX.txt
XXX could change for each installation. I'm assuming it'll be FP, as its
FrontPage you're installing.
So, just go to Find Files, and search the entire hardDrive for
*.txt
Ignore cookies, but there may be a few to look thru. It may/may not help on this issue.
eddie