We remain hopeful waiting for your lights, oh great lord of burning element..
the protection system installed or not create the delsync do you think?
I do not know about laws in Italy, so I am not going to probe on the legality issues. The protection system has become pain during the Win 7 era. It might be the protection system dlls that mismatch at times, but I don't think the game has anything to do with those dlls. Infact I think its the engine.exe that's the problem, with starforce somehow your engines are different and this throws up the error. If its legal and you have a your own copy I don't see why you shouldn't use a crack but if its not I take no responsibility! I wonder how the delsync occurs with the mod, because the mod terminates the protection system completely and does not need the "startengine.exe" or its "d3dengine.dll".
Whichever way, delsync means "File version/content mismatch". Sometimes it could be changes in the map of a player or sometimes it can even be a dll or even a small .txt file. This makes prediction of what went wrong hard so long as I do not know how the directory was modified! Try your method and tell me the result, if it fails, reinstall and try it, it may also be some of the other players who may have a file they mismatched.