I have two concerns about Gateway that I need answers for. 1. Can I add friends on sysnand or emunand to play games online? 2. Is it possible to backup and restore save files for Animal Crossing New Leaf? Where on the SD card is the save written? I'd love to make as much towns as I want, with only one copy. 3. Can you inject a header into a game, then later on inject another header into the same game? Or would I have to start off with a fresh file? To add to number 3, is it possible to change the header of a personally dumped game, by injecting another header? I want to keep my save file for Mario Kart 7, but then I don't want it to BE the same as my original cartridge.