I actually had to go jumping through some hoops to get this to work for me on CoD:WaW
In case anybody else needs some help with getting this to work (specifically my friend who forgot to backup his profile when he installed Win7) I'm just going to put what I had to do right here.
First: Extract the files
Anyway, my first error was about the cd key not being found. Since I have a 64-bit Windows my key was stored in the registry as
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Activision\Call of Duty WAW
and I had to export it, and edit the .reg to place a copy of the registry key in
HKEY_LOCAL_MACHINE\SOFTWARE\Activision\Call of Duty WAW
and add it to where it would be on a 32-bit Windows.
Then the next to errors were because I have profiles I never play as, so there was no data for them and the application closed right away. After deleting those two profile folders I was finally able to modify my profile.
Aside from having to do that, the editor worked great for me! Thanks Infini!