Launch Smoke

I need to make a smoke simulation the reflect what is shown here: http://www.youtube.com/watch?v=OnoNITE-CLc
(at 1min 40sec) coming from the launchpad. I’ve been trying and trying but i just cant get the volume and force nor the way the smoke bulges as it slows. Anyone got any suggestions or a .blend I can reference?

I would suggest using a particle system and a “point density” volume texture. You get really nice thick smoke, but the best part is, there’s not simulation and it’s a lot faster.