So if i am completely wrong please let me know as i am not well versed in 3ds software/hardware and the like but i believe i may have come up with an idea for installing ds roms as a cia for those with custom firmware. From what i have heard is the GBA virtual console isn't actually a virtual console but the rom itself running in a slowed state similar to when you ran a gba game on the ds and when you run a ds game in the 3ds, a "GBA mode" if you will. if this is true then using the same way that we create gba cia games for install onto 3ds CFW then shouldn't a ds game work the same? I know to just get the ds flash cart and am currently using the r4i but i just had the idea.