I have committed the code to show racing line on track (r1962 and data r162). You need to add "racingline = on" in the display section of VDrift.config to turn it on.
Not sure how to close the issue myself(never used Google's issue tracker before). Anyway just saw that you have closed it. Next I'll look at adding a menu option (issue 64).
I think, if you have an email address, Joe can add you to the project. To change an issue's status, you just leave a comment on the issue, and there are fields at the bottom to change the labels it has, just change the status label to Fixed.