But as for arranging, to be honest, it is very very time consuming. Most of us do it out of love for the game music that we grew up with and are growing up with now.
I've created a relatively small sheet with the Leisure Suit Larry tune, and I was suprised at how time consuming it was.
It would be cool to have a similar system as those movie translate sites, but then for creating sheet music, though I don't know how that would work as sheet music is something completely different..
I mean, on one of those moviesubtitle websites, there was a system where several users could log in to the website, and each would translate a few lines of a movie. That way an entire movie was translated with less effort.