If you notice, there is a folder in the DSTWO firmware called "_dstwoplug" or something. I attempted to add mine to the screen by making three files, nes.bmp (the image it displays), nes.ini (directs the firmware to the image and titles it), and nes.nds (what needs to be loaded). I did that and everything seemed to look fine, but when I load up the NES plugin I see the emulator start, then go to a black screen. It's a strange problem and I was wondering if anybody else tried something like this.