Multiplayer:

You can play with yourself!
By that I mean you can select Multiplayer...TCP/IP ... leave the IP address blank and select "NEW"
You are set up as the host and you can experiment with the new selections available. You can also Launch the game and you will be in the game all by yourself, just like a single mission. The only difference is that accelerate time does not work, and the loadout selections are limited (exactly as they are in 1.2)

The point here is that people who have never flown online can learn what to do in order to host a game.
Many of the selections available to the host are not available to the other players. The programmers found this feature useful to test MP routines, and we left it in.

Frame rate:

Ctrl_G toggles the frame rate on and off in game

Engine starts:

The start/stop keys are Ctrl 1,2,3 and 4 for engines 1, 2, 3 and 4