.Map :: MoHAA Mapping

I need to know what the difference between the main and the mainta folders, and i also need to know why whenever some new sound from spearhead is sopposed to play nothing happens, for example when i fire the sten, svt40, flak88, lee enfield,or ppsh no sound comes as well as the smoke nades and the russian and brit nades, think i got them all so if anyone knows why please tell me

Main is for AA, mainta is for SH. You're sounds don't work? Check the console and see what it says.