Thanks for the comment in the PR.
Regarding GameID - that's interesting.
It seems I wasn't clear enough - I want the game to be recognized as the original PQ1.
After reading your reply, I understood that I don't understand the situation well enough...
Anyway, as far as I understand now, there are two different things that are called GameID.
There's Sierra's 'GameID' property. And there's ScummVM internal 'gameid'.
You can open your 'scummvm.ini', and see the 'gameid's of the games - they are all lower cases.
The detection mechanism fallback, using .wag file, is setting ScummVM's gameid to be the GameID property from the wag file. That's why I want the GameID to be lower case in WinAGI, so it will be lower case in ScummVM's gameid, and will be recognized as the original PQ1...