knockback spell

How do you get these JESP spells to work? They make it sound so easy but I have no idea how to get it to my map. I copy the trigger and spell into my map, I change the ability code to my ability code and it doesn't work
The weird thing is I can open the map, and do absolutely nothing and try to save it, and I get errors..... How is that even possible? So of course copy paste don't work :(
I want the knock back spell from the ogre from the custom hero contest.
Do I need to change a lot of things? is this something I would need to learn JASS just to implement.
I haven't made a map in awhile, like a year, but before custom spells in JASS never seemed that hard to add to my map, like that one cold strike spell where you jumped from hero to hero attacking, and now it seems I cant add anything I want :(, I must be missing something extremely easy since most say this system is better. Im sure this is probably a noob question, but really want the spell

It sounds like you are trying to implement a JESP spell which requires JassNewGenPack (most spells do nowdays). It is a program for the World Editor which makes map-making and scripting easier.

You can download it under Resources -> Tools -> JassNewGen

Easier in what way? What are the features of this program?

Read and be enlightened.