Adding a Key Fob to Networx NX-8v2

I have a Networx NX-8v2 security system. Interlogix told me that their 600-1064-95R key fob would be compatible with the system. Can anyone tell me how I program my security system panel to link with the key fob? I’m guessing it isn’t very complicated and can be done quickly, but my security company won’t tell me how to do it and want to charge me $90 for the service. I don’t mind paying for service, but $90 for something that will take them a few minutes seems a bit much. Thank you.