what he wanted is a developer to code it inside loadiine, to decode the loaded rpx before launching the game and let loadiine pre-load the needed rpls
But don't worry, it will work soon.
Edit:
soon, but not Soon™ !
I played Mario Kart 8, Bayonetta 1, Mario Maker and Marvel Avengers with MiiMaker mode.
It was a different version for each game (hardcoded and recompiled values), but next version will auto-detect all required data.
I hope everyone kept ALL the files located in /code/ folder like I often suggested.
You will need the xml files for the next release.