i have a ps2 version 6 that has been modified. it is a NTSC/J system. i bought a Action Replay NTSC/J for the dvd region and to use codes. but i can't get it to work with back-up games. what do i need to do? i have only tried with NTSC/UC. do i need to trade the Action Replay that is for japan for a NTSC/UC? can i use PAL codes for PAL back-ups?