I didn't raise my car just did it on my drive with a good old screw driver (although my hands were in pain after i spent the few hours doing it).
It will be benefitial if you do pilot holes, the bumper wonn't crack if you use a small screw/drill piece on a slow setting!!
Similar with Nick_A, i didnt raise my car, I reversed my whole car up a kurb (using some ramps!), with just the front bumper hanging off the edge, gives abit more room