not sure what you mean by that but we've tried multiple ways
simply copying the folder from program files: didnt work
archiving from my pc. copy archive to his pc then unarchive using impulse: didnt work
copying folder, then using impulse we clicked 'detect game' or something, that said it should have found the folder and made it look like it was installed: didnt work
archiving, unarchiving AND doing the 'detect game' thing: didnt work
all this was done with me completely logged out of impulse and not playing the game at all. and all times he was logged in with my account meaning the cd key was registered to him at the time.
quite bizzare 