Well I THINK I know what is going on and I need a little confirmation.
Last night I reloaded eveything to do with the GP7s again (I lost track of the number of times I have done this in the past few weeks

)
But I still got the same results. So I started fooling around with the engine in a scenario and came away with the following ideas.
1. Each version of the engine has 3 variations or options (lead simp & Trail if I remember right).
2. Two of the versions seem to need me to drive the engine by using the keyboard or the levers in the cab. (I couldn't figure out the sequence (too many combinations of options and settings) but I got the engine started and ran part of a secnario before I derailed the engine because I couldn't get it slowed down fast enough. )
But I could NOT drive it using the sliders (for lack of a better word) the accelerator, direction and the brake sliders shown in the HUD.
3. the third option "simp" allowed the engine to be controlled by the sliders. and the engine seems to work like any other engine driven by the sliders. (it was so late that I didn't get test it very much).
I know the read me file said that this was the simple mode.
My question is this. Is this simple mode the same as the Game's simple mode? (I think this is where I am getting mixed up.)
Or can I run the GP7s in this "simp" varation in any scenario and have the GP7 respond as anyother engine would? (When I have the game set to expert mode)
Please help
Dave