Copy and paste the lines BETWEEN 'start' and 'end' into
your Sierra/Half-Life/Cstrike/Sound/materials.txt
document.

===START==
//De_Troy trojan.wad
W mrs_barrel1
W mrs_barrel2
W mrs_barreltop1
W mrs_wood1
M mrs_door1
M mrs_door2
D mrs_desert
D mrs_sand1
D mrs_sand2
D mrs_sand3
D mrs_sand4
===END===