I've followed the installation instructions, but have a few questions: I only have one 2gb micro sd card at the moment therefore it has the following files: luigi's mansion 2 rom + _DSMENU.DAT and _rpg - is this ok, or could it cause a problem not having them separate? What function does DSMENU.DAT and _rpg offer? Regarding the blue card - can this be used for anything else or is it only needed for initial installation? Saves- where are they kept...? Could I take LM2 ROM off the card, put MK7 ROM on, play for a few hours, then put LM2 ROM back on and carry on where I Left off? Any help is appreciated as I'm a bit of a beginner with all this.