Quote Originally Posted by toenailed
actually the format was like this for ACWW

Game Code = "ADM" + [Country Code]
Country Code = "P" for Europe, "E" for USA
System Code = "N" for Nitro
ROM Version = "0" for 1.0, "1" for 1.1, "2" for 1.2 etc ...
?? = "J"

ADMEN0Jxx for ACWW 1.0 [US]
ADMEN1Jxx for ACWW 1.1 [US]
ADMPN0Jxx for ACWW 1.0 [EU]