This game is titled DiRT in North America and Colin McRae: DiRT in Europe and Australia.
When doing the CORR Rallys, if the race has a bend first, wait until the other cars have gone then accelerate. This will get you out of the pile up at the first corner.
Accelerate about halfway down at the beginning. When you are familiar with all tracks, accelerate hard on the straights and brake a good time in advance before a turn.