Ok, if you can't get the cheat code button to work on your R4, this is how to activate it! 1. Connect small card to pc. 2.Then, transport the essential files to your desktop. 3.Go to My Computer and right click the hard drive location of the small card. 4.Click format and set it to FAT32. 5.Format it and then drag everything back into the small card's hard drive. 6.Make sure you have CHEAT.DAT or usrcheat.dat in the _system_ folder 7.Eject card and enjoy! Yes, every screenshot by me.