It works fine, but why would you do this? You'd have to add structure to your SD card for the emulators to be read in Homebrew Launcher, you'd have to boot into the game, run the hack through its menu, then launch the emulators.
Or just download the .3ds of the emulators and run them that way from Gateway's menu.
because there is a blarg unofficial build with sound but it is in 3dsx format, so there is one reason