Apparently, to keep the AI in the pictured 3x "grid formation" for the formation lap, the AIW file needs a "left line" added to give the 3x11 formation room (width) on the track. I have no idea how to do this. There is no rFactor version of N2LO's Indy track, so I'm not sure that the rF AIW editor can be used(?).
I'm also not sure that GTR2 will support a 3-wide grid formation even with a "left" line. Is the game "hard coded" to only do a 2x formation lap?
Can anyone provide answers to these questions?