I wanted to integrate the *.exe file for my modded Battletech game.
Should be simple like that...yeah...but there was Galaxy >_<
So I remerbered that open source tool Playnite - and just like that,
I could add the Battletech Advanced 3062 Launcher.
So, give that nice tool a chance...nothing bloated as hell, just a tool for your needs !
Playnite.link

Have fun =)

If you want to add another executable to a game,
1. Click the "More" button to the right of the Play button.
2. Choose Manage Installation, then Configure.
3. On the Features tab, check "Custom executables / arguments".
4. Click either "Add another executable", or "Duplicate" if you just want to launch the game with custom command line arguments.
5. Optionally, select "Default executable" below your newly created entry, so it launches when you click the Play button. Otherwise, you can launch it from the "More" button, Additional Executables menu.