I can, and it's most likely much simpler than you guys think. You only need to swap out the title ID for the H&S one and make sure the injected title is encrypted in the same way as original H&S.
Source code:
https://github.com/d0k3/GodMode9/blob/master/arm9/source/utils/gameutil.c#L1784
You'd think by now we should and would have learned to read your github for more info but end up trying to reinvent the wheel when it was somewhere back there in storage. Here I am trying to do what you did by brute force... I think I need to go get a beer, take a walk or something.