sorry jenga, I really don’t think there is a 1,2,3 process for doing something like this. it’s so complicated to do it’s just one of those things you just jump in and do. I know that there are some tutorials on dynamics and wheels, I wrote one for the process of doing dentable metals. there is just soooo much to it, especially if you want photoreal. I’m still in the process of working on my incomplete entry. I have many particle dynamics to calculate, then texture and render is a whole nother issue. compositing and such to add that extra little detail.
the best thing to do is to break down what you want to do… search out tutorials on those things. for a car wreck, look for tutorials on car modeling, then car dynamics, then a texturing, then particle or dynamics, etc. etc. they don’t have to be specifically about cars, they could be texturing a set and use that to help you learn how to texture a car.
it’s a lot of cross referencing… but it can be done with a little time and patiences.