Ok.
In order for this to work you have to add the games manually at retroarch.
1. In retroarch. Load core > ScummVm
2. Dont select Quick menu. Select Start core.
3. There you can add your games.
For Emulation Station launchers for each game here are the steps.
1. Make sure you create a file inside the folder with the same name of the folder, example is "the 7th guest" so you have to create "the 7th guest.svm" (scummvm as an extension also works but you have to edit the ef_systems.cfg file so stick with the svm file).
2. Inside the file should be the the game short name corresponding the game. Found in this link ScummVM compatibility list. In our case we will input "t7g" inside the file (that is it).
3. Reboot for emulation station and it will see the file.
Hope it helps.
