Exploring a BUN file

I've received a BUN file which won't load. Sonar just hangs after seeming to process three audio files. It appears the waves may have been recorded at 64 bits.
 
Is there a way to explore a BUN file without actually having to open it? Some utility that's been written?
 
Thanks!

ask him to re send it in project form. archive it(Audio files and project) using win rar.
 
on a related note I did find this:
The BUN file extension is associated with Monkey Island 3 adventure computer game, developed and published by LucasArts in 1997.
A *.bun file contains game data used in the game, including graphics, texts etc.

Of COURSE I have (not) tried safe mode ;-)
 
Trying now.