Set-up can also depend on driving style/preffrances. e.g - I absolutly hate under-steer (common on front wheel drive cars), but it is possible to set the car up to reduce the amount of under-steer, but be careful - too much over-steer is far worse. This is achieve by playing with the suspension, make them stiffer on the front than the back and have less anti-roll on the back than the front. If under breaking, you find the backend starts to come away, then move the break balance more towards the front (about 80% is a good starting point).
Driving style is very important, on corners remember the best bet is slow in fast out.