For the music simply go into the data/sound/music folder and open music.cfg file. where it says tracks enter the number of tracks and then delete the ; symbol that the gwx team put in front of the track name (they use the ; symbol to bypass the track) save the file and enjoy
ORIGINAL
[BEGIN]
Tracks=3
Track1=Empty.ogg
Track1=Intro_1_Master.ogg
Track2=Intro_2_Master.ogg
Track3=Intro_3_Master.ogg
GWX ALTERATION
[NORMAL]
Tracks=1
Track1=Empty.ogg
;Track1=Stalker_1_Mix.ogg
;Track2=Stalker_2_Mix.ogg
;Track3=Stalker_3_Mix.ogg
;Track4=Stalker_4_Mix.ogg
;Track5=Stalker_5_Mix.ogg