I have some insteresting news...
Mame have a opl 3 emulator, and I found a free ImfPlayer (with source code), that plays the original .imf musics... Wolfenstein/Spear/Blake Stone...
So, instead that huge ammount of mp3 files (19 Mb) a 90Kb dll and a 440 Kb DataFile (the pack will all original music) Will be Shipped with the game... (also, I add some missing sounds, and pack then into one only file)
I have the imglib.dll source code, compiled perfectly with dev-cpp and tweaked to have volume and error callback control! (yes, I'm multi-language...)

The "Final" version will be small, fast and use only a small set of files... very professional working no?