Hello,
I presume that you have FsX / Acceleration.
First make a safegard copy of your aircraft.cfg under another name. Then edit the aircraft.cfg file and
add the following sections.
[TailHook]
tailhook_length=4 ; //feet
tailhook_position= -12.5, 0, -0.8 ;//feet longitudinal,lateral,vertical positions -> datum
cable_force_adjust=1
[launch_assistance]
launch_bar_pivot= 16.3, 0, -4.0
launch_bar_lug= 17.3, 0, -4.8
These examples are taken from Restauravia Zephyr. But you will find similar sectiions on the FA-18. You will have to addjust the parameters of these sections in order to fit them with the geometry of the aircraft model. It is a trials and errors tedious process, so do not worry if it is not working at the first trial.
Have a good day
Benoit