OKAY, GBATEMP HERE'S MY PLAN. I have a 4.1 (I think) 3DS that's been sitting here ever since I heard of the 4.x firmware being supported by gateway, and being the simpleton that I am, I decided that I'd hold on to it because it's better to have a 3DS that supports free games even if it's a non-xl. This was after foolishly updating my 3DS XL when 3dbrew.org SPECIFICALLY told me not to. Main reason for doing that, though, was because I had no source of income and gateway cards were expensive. They still are, of course, but not as expensive as they were then. Now, however, I've looked into the development of the Gateway 3DS, the basics of how it works, and even the source code for the gateway cards themselves, so basically what I've found out is that I can have a normal DS flashcart like this one, place the ROP tool.nds (needed to change the DS profile strings to cause the crash) into the sd card for the flashcart, go into the system settings and actually trigger the crash, which will then cause the 3DS to load files that I have put on the SD card (main one that plugs into the 3DS itself), which may include CIA files. Now, I'm not sure how correct this is, and credit goes to the people who have released the ARM code, tools, etc., but I would like to know exactly how this works. From what I understand, you need to have your own NAND backed up to "sector 1" of your main SD card. I'm not sure what "Sector 1" means or what partition format it has to be, but my guess would be either FAT or ext2. Not sure, which is why I want to ask anyone who has used their sd card for gateway and looked at the partitions to see what partition type and size it has to be. The custom firmware I found references the NAND on "sector 1" to work properly, and you absolutely need it. Basically, I'm confused about how this process works with setting up the SD card and backing up the NAND. Is there a loader that can dump the 3DS nand into the right partition that I can run using the DS mode exploit, or do I need a gateway card?