Just a matter of dropping a file into a folder to have a chunkloader, you know.
Also, OP, why not just add ChickenChunks to your pack? You asked what others would do in your situation. That's what I'd do.
I don't like to change the FTB modpacks... because I know one thing - I know that I DON'T know what I'm doing.
If it is literally as easy as downloading a zip file and extracting it and placing it into the proper folder... then yes, I could do that. Please pardon my ignorance, but I kinda viewed the FTB modpacks as "sacred" (i.e. untouchable). Silly attitude, huh?