Navigate here

GTAV > mods > update > x64 > dlcpacks

Drag and drop content from DLC folder here


Next navigate to your ELS 

drag and drop the xml here


Finally, navigate here

GTAV > mods > update > update.rpf > common > data > dlclist.xml

Right click the dlc list and click edit. 

Scroll to the bottom and insert this line below your last dlc line 

<Item>dlcpacks:/sound_str4ls7/</Item>

Ensure you place this about "paths" or else it won't work

Tada! 