so today i felt like playing some of my old gba games. i dont have my old gba but i do have my ds fat. and i got to thinking, is it at all possible, or is there something already out that would enable me to use my R4 as a gameshark/action replay for gba games? i know you can't run gba roms from a ds flash cart, but you can boot slot-2 gba games from them. so my questions is, would i be able to use my R4 as a gameshark/action replay emulator almost (choose my codes, then load my gba)?