HaloMods "Classic" Read-only Archive

I've looked everywhere I could, and I can't figure out a way to inject a new lsnd, or even an snd!, into a map. I want to add theme music to triplicate, and I know this is at least marginally possible due to the lockout paintball mod by p8ntballer and his compadres. Could anoyone help me out? Thanks.

theres an app for it do a search in the files forum

is there any way to inject a sound that's longer than the original?

just inject the sound into a longer sound and relink