you could probibly strap a few ion thrusters to it, they are fairly lightweight and small but require a big power source. once the ship is weightless the miniscule thrust they create should be enough to hold the ship up.
there was a thing with a sattelite where the rocket faliled to reach orbit, but they managed to manuver the sattelite the rest of the way op with the ion thrusters, which were ment for position holding.
the cool thing about space ship one is that the rocket engine is such a simple design, and the whole ship is made out of lightweight composite material. the engine is a hybrid design, using a rubber/n02 engine, the no2 tank can be easilly refueled and the rubber comes in bolt on cylender that includes the engine bell and the combustion chamber, which can be interchanged with a larger one inbetween missions. they probibly recycle them.
space ship one is so amazingly simple, the controlls are manual (direct linkage between controll surfaces, no interlingking hydraulics or fly by wire systems), the avionics are low profile, the reaction control system uses cold co2 gas instead of rocket fuel, the craft decelerates in upper atmoshpere, eliminating the need of thermal tiles. its not something nasa could have come up with.
