Unfortunately, due to me being slightly more technically savvy than the average Joe, I have never used windows Easy transfer, because I find it easy enough to do this myself.
However, I did look up a tidbit of information from MS's own support site that suggests to do this in stages:
USB flash drive or external hard disk
What you'll need: A USB flash drive (this requires a USB port on each computer) or an external hard disk compatible with both computers.
Start Windows Easy Transfer on your new computer (the computer to which you want to transfer files and settings), and then follow the instructions for using a USB flash drive or an external hard disk. During the transfer process, Windows Easy Transfer will estimate how much disk space is needed to transfer your selections. If you use a USB flash drive, try to use one with enough storage space for the entire transfer. If your USB flash drive isn't large enough to transfer everything at once, you can copy as many files as it will hold, transfer those files to the new computer, and then reconnect the drive to the old computer and repeat the process.
Note
To decide what method to use, consider how much you are transferring. If you're transferring everything from all users or all of your user account files, for example, an Easy Transfer Cable or a network is a good option because the transfer can take a while and you won't have to worry about having enough room for everything. If you're only transferring a few files or folders, then consider using removable media such as CDs, DVDs, or a flash drive, any of which might be as fast as using an Easy Transfer Cable or a network.
So, while your heart was in the right place, it might not have been the best way to do things.
If there were problems with the computer, I would have just connected the flash drives and copied the usual, "C:\Documents and Settings\User\My Documents, Desktop, Favorites, My Pictures, My Music, etc." any PST files from mail and tried to make sure that product keys and installation media were available, then do the reformat.
If there weren't any real problems with the computer, I would have probably used an imaging software to create a ghost image.
Since the computer has already been wiped, I guess that doesn't matter anymore.
You're going to need to look up info about how to get the data off of those flashdrives I guess, here's one I found from a quick google search:
http://windowsxp.mvps.org/fast.htmHope this helps!