I've followed numerous tutorials on gettng the Action replay cheats to work on my R4. Here is one that I've tried recently: INSTRUCTIONS FOR USE: On your MicroSD card, find the folder called "_system_". Delete your old "cheat.dat" and "usrcheat.dat" from that folder (back them up to your PC if necessary). Place the new "cheat.dat" inside the "_system_" folder. NOTE: Avoid just overwriting as that CAN cause some codes to fail to appear on your flashcard. Remove the old dats first, then add the new one. I have tried everything! Why the heck can't I get it to work? Do I have to name the .nds files the same as its named in the cheat.dat file?