Knocks said:Modified versions of Guitar Hero don't have standardized game IDs. Hundreds of people are modifying Guitar Hero and uploading that crap all over the torrent sites, all with different IDs. Those people don't talk to each other and don't agree on a game ID beforehand, so good luck accomodating all of them in a database.
You're right, they're not standardized at all, but there are people out there that love their GH3 and custom builds of it, so they modify the game ID to be what they want, and use custom artwork they've created to match that game ID. If you're not using 6 digit IDs then there's no way for them to accomplish that.