1) CameraName CamSetFOV ###
### = a number between 0.001 and infinite.
0.700 is normal, 0.100 is zoomed in, 1.000 is zoomed out (looks buggered, don't use it)
2) Try looping the camera, or using the cam-follow script from the Ed Depot. Do a search for "follow vehicle" or something, and it should turn up. Otherwise, give me a shout and I'll help you find it.
I really suggest looking at that script.
Cheers mate.
Edit
Dang I type too slow.