*slowclap* he is talking about a script system, bro.
My suggestion is to to a basic search in the script for any instance of attack 86. Usually the script writer will include comments on how to modify the system at the relevant points, and there's probably a bracket that includes all the attacks that do rapid attack. Once you find the right section and if it has brackets, putting a comma between all the attack numbers will tell the script to apply rapid attack to everything in the brackets.