Make "The Veldt" jungle theme play everywhere on the overworld Map.

Don't care about WOR, that's OK the way it is. I'm talking WOB, because I want to do a Donkey Kong hack where Donkey Kong replaces Terra and the World of Balance is the jungle. Also any hex editing tutorials on here so I can find the perameters I need to change on a hex editor? I've tried it many times but I often change something important because my Rom fails to start or crashes after I try to hex edit it.