I have that but I had no chance against that washing machine car since it kept spinning me out
As for B-Spec, that might take a long time...
Edit: I'll have a 2nd try...
I wonder if anyone discovered this glitch in the race preparation screen, it works for me at least:
1. Do a event (in GT Mode) where you can race the whole championship
2. Win the race (not sure if it still works if you skip or place somewhere else)
3. Go to "next race"
4. There should be some revving as if the race is starting
5. From here you can control your car (somehow) - enjoy wrecking the ai drivers!
Note: The camera may not focus on the start line but if you get vibrations on your controller/wheel it works