Not really. I create updated ARMax discs every so often and from what I've figured, the PAL and NTSC discs will only load the corresponding codelists. An NTSC disc will not load PAL codes (and vice versa) eventhough the disc has both codelists on it. I found out recently however, if you copy the PAL file codelist.bin into your mc and load NTSC ARMax will show both codes. NTSC from the disc and PAL from the mc codelist. And from what I can see, if both codelists have the same game, the game from the newer codelist will override the one from the disc. A strange spin on this though, if the same game have different region info added, they will both show up...