Go see a laywer now, it may cost you 500 to 2000 to see one, but go do it now else your screwed and youll more then likley be paying of somones rav 4 (still a possibilty if you have a laywer but less likely).
Recommend
Cammata and Lempens
http://www.camattalempens.com.au/
btw not to get on your case to much, but morally you partly are at fault beacuse some poor person got their car written of because they miss judged somones speed when it was double the speed limit which they could prove in court from your skid marks btw.