Yes, you can - with recent versions - also start FS-UAE Launcher with the game UUID (autoselects variant) or game variant UUID as parameter.
For example, to start Lotus Turbo Challenge II:
Code:
fs-uae-launcher(.exe) df05121d-e093-5e11-be88-b1cbbb36f03d
You can find the UUID for the games in oagd.net on the "edit" page for a game. Yes, it is a bit cumbersome, I know. I really should create a general "create game shortcut function" and/or export game entries directly to Steam shortcuts list...
Note: If you use the portable version, you cannot create a shortcut to "FS-UAE Launcher.exe", you need to add a shortcut to the fs-uae-launcher.exe file within Windows/...