It is indeed just an executable, so dragging and dropping works, I tested, although there's no media at all in the database, which I understand.
Like mentioned, I tried with the RA core but I don't see the point of running it through RA, as you can just run it as a Windows game, plus you're not only restricted to RPG Maker 2000/2003 games, but you can use games from any version.
Problem is that there's quite many games available, so editing them all one by one takes loads of time. How to scrape them properly, that is probably quite difficult, as nothing really stands out, even the executable is named randomly.