(...) You copy the firmware upgrade (DS ROM in disguise - ez5upldr.bin) to the root of your microSD and hold down the R trigger as you boot. You will be presented with 3 options: R to Update, L to be PassMe, A to enter the loader. Hitting R will search for ez5upldr.bin and if it is found will begin the update process. Hitting L will make the device search for a GBA flash cart and if it finds one it will attempt to boot it into DS mode. When I tried with my m3 miniSD it just resulted in white screens. It's no big deal since my DS is flashed but it might be for others. (...)