Something i found on the web today.
http://www.fsdeveloper.com/forum/showthread.php?t=425397

I tested it on WW's official Prism Tank scene and it worked.
Make sure there are no spaces dots or unsupported characters (" * : < > ? \ / | etc...) or duplicate names in any of the object/light/etc names because that will mess up the output files.

If you want faster listener grabbing use YAGG it's faster but it does need some extra clicks, save as txt
http://yagg.doubleshadow.wz.cz/
or find any other gmax listener grabber