For the ultra, you do groundschool first, as with all the a/c
(i think). I think it was a week or so of only groundscool, then you had a few hours in the cockpit procedure trainier, then you started to do the sim.
You have 6 sims then the ride. They are also willing to give you 2 additional sims if they feel you need it. That is provided that you are not an a$$hole during training and are putting the effort fourth. If you are too far gone, then you probably will be sent home, but that means you have to be doing REALLY BADLY.
Some guys in my groundschool needed they extra sims and got them....then took the ride no problem. I am pretty sure that all the a/c have the sim set up this way.....excluding the BBJ.
hope this helped,
1900cpt