I add my new friend code from emuNAND to my real NAND and add my old friend code from real NAND to emuNAND. Actually I see no Problem there. I only think that it will most likely fail, because the factory reset would have an effect on the real NAND.don't you both have to add the friend code before you are actually classed as friends.....so you would need to restore your original nand to be able to add the new friend code that gets created