This is a great idea and seeing they're replacements gives me the idea that it might also benefit replacing some of the game voice-overs and music.
Though I've successfully edited LWF and DBF files manually in the past it's complex without tools and probably unreasonable to expect the casual mapper to attempt it.
Including wave files for WAC scripted audio is also a bit cumbersome in execution, often failing to loop or play at all, even overriding the game sounds and crashing it.
Formatting was problematic and often the cause of the above with file size not only being critical for correct operation, the total size of all included files was fairly restrictive until Scott recently raised the upload capacity for missions.
Replacement seems such a better idea.