recovering from a disk crash

Last Friday evening by son, who uses my machine sometimes and to whom I
erroneously gave administrator rights, I was removing a game he had
previously installed for the game that manufacturer's uninstall. The game
was an XP game. He should have gone through the control panel facilities to
uninstall the game: for it trashed the partition entirely.

This was a dual-boot machine: XP-pro on the C: drive, VISTA ultimate on the
F: drive. An external USB drive had my backups, made as a cloned copy as my
G: drive and my H: drive.

Microsoft MSDN tech support had me reinstall vista. So my system now boots
with either "an earlier version of Windows" or "vista" -- a clean copy of a
vista.

So I now have the ability to go to either XP or vista, but want to copy my
G: backup drive a top of the F: drive, but I don't see any boot record on
the G: drive, so I'm hesitant to simply do a clone-copy from the G: drive
back to the F: drive.

So all of my programs are stuck on the G: drive. What is the easiest way
for me to get them back?

Thanks!

Ross