Green Indigo2 comes out. Best graphics on the desktop. All three sell well. Nothing else changes, including the name. We figure people will be happy to get more for the same price.
Problem is, people get confused and ask lots of questions.
Now on to 'hinv'. As far as identifying graphics configs, it uses a pretty simple algorithm. GR3 is green. So you get GR2-XZ if it sees a GR2 board and 2 GE's. When it sees 4 GE's it wants to call that an Elan.