The key thing when jump starting anything is to rev the engine to say 2000rpm on the working vehicle for a few mins and then start the car with the flat battery.
Follow that approach and you could jump start a V8 diesel from a smart car. 
So Mark ..... what's your opinion of where the jump leads should be connected to? I always use the battery terminals, however some say that you should use a substantial earth (I know I know
) connection on the engine/chassis .... voltage spikes??? :-/
It should be pos to pos on the battery terminals and then neg to th running car battery terminal and new to a substantial 0V on the engine such as a lifting bracket.
reasons are many and include.
1) Any spark will be created when the final connection is made and this will be away from the battery......this is a good thing as batteries (even sealed ones) can vent Hydrogen!
2) It gives some compensation for the resistance of the leads (as you lose the resistance of the battery to engine wire)
3) It reduces any possible high in-rush current from the running vehicle to the flat battery as you now have the jump lead resistance plus the battery 0V lead to.
It may sound far fetched but, with the amps we are talking here, the resistance of the leads are NOT negligible

The reason behind reving the engine for a few mins is so the running cars alternator (you cant overload them as they will self regulate) actualy dumps some charge into the dead cars battery before attempting a charge.