I have a m3 perfect and it works perfect with m3 reals build in gba function. i didn't need to flash it or anything. I have a M3 real (Bp3E), 8GB sandisc micro sdhc and a M3 Perfect, 2GB sandisc micro sd. And I dont have to boot slot 2 to play gba, it's very handy. Now I only need a program...