I have a 3ds XL on system menu 4.2.0-9U and i decided to purchase a Gateway 3DS. I downloaded the Beta Firmware files and read the manual and notice the blue cart is a R4i. I have a R4 cart so i decided to launch the gateway installer from it and it booted up flawlessly. I completed the installation successfully and copied the launcher.dat to the root of the SD card and followed the rest of the steps. bottom line is, i got the 3ds in the GW System menu and updated the emunand to 7.1.0-16U. So far so good, all i need is the red cart when it arrive to test a game.