I got 2 questions, hopefully someone knows the answer.

1. How do I fix the camera to the car, so that I don't have to take care about car movements? The camera should, for example, always point to one of the tyres, no matter if the car drives a turn or not. I wasn't able to find this out myself.
2. How do I zoom in and out while recording and without using the SPACE-bar interface?
I tried + - but they didn't work. I saw this being done in a few movies. I sure hope they didn't use the standard camera for those effects...