I was in your exact shoes last January. What I recommend is the same as the other posters.
1) Whether it is Flight Safety or Simuflite, call them up and get the "bold face memory items" and memorize these!
2) Read as much as you can on systems, that way when your ground instructor goes over it in class, it will sound familiar.
3) Memorize the flight profiles.
4) If possible, sit in the cockpit and get familiar with the location of all guages, switches, etc.
5) When you call the school to get the materials, ask them what you should review. Tell them your experience level.
Training will be routed to you via the fire hose, therefore learn as much as you can now. I made up flash cards prior to school for the bold face items as well as limitations. I use them today while I am on the road, just to stay fresh.
The sim is like any other, extremely sensitive. Fly it gently.
I was the least experienced pilot in my class, and asked the most questions. My classmates respected me for that. They were all great guys, whom I still stay in contact with today.
Most of all, have fun! The Beechjet is a blast to fly.
Good luck!
