Quake Monster & Boss Sounds addon

This was tested on both Steam Half-Life and on the retail WON Half-Life, Open the sounds folder inside the Valve folder and select sounds you want to replace and back them up, Then place the sounds of your choice from the winrar into the audio of whatever monster sound folder you have selected.

This was not tested on the expansion packs like Blue-Shift or mods but it will work likely there too.