ok, there's some deep comparison between an old instalation + using SS2tool to patch it and the gog instalation... exex are the same, same md5 and all... and there's two difference in the configuration files... so they took comunity work, removed the credits, said it was their work and that they greatly improved compatibility and republished it without change... while everyone agree that it's great to have some SS2 distributed again, there's clearly a problem there...