Hi, Joe.
Just delete its boot folder. Be sure you get the right one, of course, but
since WinXP will refuse to delete the one that it is using, just boot into
the one you want and delete the other one. If it refuses, go back to Step
1.
By default, WinXP names its boot folder \Windows, except that when upgrading
from an earlier Windows, it inherits the name of the prior boot folder. If
the second copy of WinXP was installed into a separate volume, you may have,
for example, C:\Windows and D:\Windows. If it was installed into the same
volume as the first copy, you may have C:\Windows and C:\Windows(2), or some
similar variation.
After deleting the unneeded boot folder, run msconfig and, on the BOOT.INI
tab, click Check All Boot Paths to eliminate the deleted one from the
opening boot menu.
RC