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Have you tried running it as administrator?
Thank you, but it was not the problem. So I tried again differently, I copy/pasted all data in a fresh GOG install (because of the registry) of Commandos 2, except the DATA*.PCK files, and now it works! Thank you a lot, it is good to see it wide screen. But sadly the mouse is very slow, and continues its movements even when I stop. So the game is not very playable. Anyone has had such problem?
I saw similar problems with the official HD version on Steam, the solution was to add a `-refresh 30` argument to the launcher, but here it doesn't work. Any idea?