Wouldn't it be possible to do something like waninkoko's savegame extractor and savegame installer? (not the one with both, there you don't need to have the game disc inserted, i mean the one where the extractor and installer are seperate apps..) So you could insert a game, dump the savegame onto the SD card and there you go! This would be way simpler, if it works...
However I also think that preventing piracy is Nintendo's job, and it's their fault if people can still download and play games without paying. For the nintendo DS I didn't have an AR MAX DUO, only an Acekard, so I made a new game on there even though I had the original, just so I could use the save on my computer... And that was much simpler than AR MAX DUO sounded, although I never tried it.
Edit: I guess what i said is about what yoshisrock said so never mind...