It would be a good idea for those who are new to FPSC if they were to copy all of the scripts to a folder as a backup and then open them up in notepad to study them somewhat.
They are fairly easy to understand.
If you open them up you will find a description of what they do at the top of each one.
You should fine a suitable default script that will get your enemy to do what you want.
After finding a suitable script read the manual to find out how to place path waypoints correctly.
If you have difficulty try making a simple test level placing an enemy with appropriate script on a simple two point straight path.
Then place the player marker and give yourself a weapon and some ammo.
Keep it simple until you get a successful test and you should not be able to go far wrong.
"I am and forever will be your friend"