I used to play my DS ROM's on DS and DSxl's using a flash cart. on the last DSxl it would always freeze and I would have to take the microsd out and rename a directory to make it work again. I not want to use those ROM's on a 2DS that would be purchased new in 2017. What method should I use to make this work on a new 2DS with current firmware? I haven't done this stuff in a long time so I'm not familiar with the latest terminology.