For more realism practicing Dead Stick Landings using sim G4, turn on wind and turbulence!

First, here again is how to set the Kill Engine option:
Go to menu option Simulation/Flight Failures/Frequency/Always.
Then, to only allow failures for an engine out, deselect all the other options under Simulation/Flight Failures/Enable, only leaving a checkmark next to 'Kill Engine'
The 'Always' option, according to the manual, says each time you reset for a flight, something is guaranteed to go wrong, usually choosing some inconvenient time.

Now for the Wind and Turbulence:

Go to Simulation/Settings menu.

Then expand Wind and Weather and single click Global Wind. Set both Variation and Gusts to 40. Set Wind Velocity to whatever you want to simulate - I suggest about 10 - 12 for a trainer.

Then expand Turbulence Systems. Set Turbulent Layer Height to the maximum height you will be flying, say 200 feet for example. Set the other two options at 10.

You'll find this is a good mix - don't set any higher for a trainer or it won't be realistic.

Have a blast!