General Music Hacking Guide

Sorry if I sound like a noob, as I'm relative new to this type of hacking, as of now, I can do nothing more than changing around the instruments in the FF6 battle theme - "00 0D 00 0E 00 1E 00 02 00 0F 00 11 00 12 00 22 00 14 00 00 00 00 00 00 00 00 00 00 00 00 00 00" Changing things like "00 0D" to "00 06" isn't all that overwhelming. But what I want to know if I were to take say, a song from CT/Silent Light, and replace it over the FF6 cave theme (like what GiNattack did with the Eternal Crystals hack), what exactly do you do to place it in the right sequence? Do you copy and paste it in a text editor and then edit it accordingly with a hex editor?