House of the Dead 2 in Australia

I have a copied version of House of the Dead 2. Hey, if it's good I'll buy the original (as I will with Shenmue, and as I've done with Soul Calibur). My question is:
Has anyone tried this game with the guns available in Australia? Whenever I plug in my gun, I get the on screen msg (The controller in Port B is not supported in North America). I'm guessing the game is in NTSC and is looking for NTSC controllers. It seems to work with the joypads tho. Can anyone help?