- Hi! I'm thinking about installing rxtools on my 3ds xl 4.3U and acesso emunand via DS Profile exploit. When using gateway, IF you load any NDS ROM via blue card after the DS profile exploit is installed, the DS erases it (emunand untouched in the SD card and problemas is easely fixed by reinstalling via blue card the exploit and booting gateway mode again). But since i'm not talking about gateway emunand , i'm wondering if the same would happen if I load a NDS ROM in a R4 card. Would it eresa rxtools DS profile exploit as well? Wich NDS only Flashcards I can use in order to play NDS ROMs without deleting the exploit?