Yes, they'll be just a cart booter with custom icon and name. So when I launch it, it boot my dstwo, and then I manually open the game I want.
I managed to create some and they worked on my dstwo, but I had a problem with the Unique ID (CTR-XXXX). I can't put everything in XXXX and expecting to work, so I used the same in all CIA. However, I was able to change the Title ID (which is actually the game-per-game identifyer I guess), so I can install differents CIAs. At here, i'm 99% satisfied with the results.
But I think in the activity log It take the Unique ID to identify the games (that one with CTR-XXXX), so I think there's is a conflict.
I'm trying to find what can I put in XXXX.
For example, Pokémon Diamond NDS ID is "ADAS", so I make a CIA with CTR-ADAS (and a random title id, so I can install differents and they won't overwrite another ones) and It work perfectly, but then I make THE EXACT same CIA changing "ADAS" to, for example, "ABAS", and it won't work anymore (even doing a full reinstall, uninstalling the old one before and even changing title ID). It crash just when I launch it. (An Error Has Occurred. Hold Down the POWER Button ...)
edit: nevermind, I think I solved it. If so, I will explain how to do it