It is possible that they were not completely uninstalled.
Do the titles still show up in the ADD/Remove dialog?
Or, are the folders for the games still on the computer?
If that is the case, try deleting ONE game folder, then try to install THAT game. If it installs, then delete the remaining old installs.
Otherwise, you might need to delete the references that MIGHT remain in the registry, for the HPS games.
I would check the other options, before tackling the registry.
<b><font color="gold">Ernie Sands
General, Commanding, Army of Ohio
ACWGC Cabinet member
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