well, since one of the cracked mta i've seen had the same size of the original one, i've thought that the guy who created that might have just changed 2-3 small variables.... so if the client hashes (that's the word i was searching for ) itselfs, it would be easier to know that it's cracked... no?
Hum opium, i don't get it... what would it change if they would re-download it?
Oh, and the digital signature of mtaclient.exe (md5) is 51 B9 31 2D AD 4A B5 9A 21 FD F1 B1 89 27 D0 55.... not a very long string to send