For a non be server
Step 1: Get the script executor i recommend YOLO Hack although it is detected. But that doesnt matter as the server is non BE, get the hack from here
Step 2: Get a good script, I recommend inFistar 7, get this moddified one from here
Step 3: Extract the folder to your arma folder and rename it to infiSTAR_SEVEN
Step 4: Run the game inject the yolohack.dll when in main menu, use winject find it here
Step 5: Join the non BE server and press home, and then browse to arma folder>infiSTAR_SEVEN> and then select startup.sqf
DONE
In game press f1 for the menu
If you are getting script restrictions get this here and put it inside your infistar_Seven folder and replace the exsisting one
Hit thanks if this helped