[thatguy96]

If you don't have any intention to create new sounds then its pretty simple. If there's a 0 in any "sound" field, it plays the default sound. Otherwise, you can manually enter a specific number into the slot and it will play that sound instead. So basically, if you find a sound in the appropriate format, just assign it a number (up to three digits I think) and toss it in the sound folder and then put that number in the appropriate field in Mobhack.

I'm not sure what the default sounds for other non-unit actions (like artillery sounds and such) are and I'm sure you'd have to change the files currently in those slots to change that.