you use the F165 editor program to enter and save your script, then you copy it into the device (by connecting both machines - your computer and F165 with the cable that came with F165)
to run your program, you do not need to be connected to the computer, it's better actually run in a standalone mode, disconnected from the computer
if you have more detailed questions you should contact Atelier Robin in Montreal, there you should get all the help you need