1a. Navigate to:
Mods/update/x64/dlcpacks

1b. Drag and drop the GROANSPATCH folder inside.



2a. Navigate to:
Mods/update/update.rpf/common/data

2b. Extract dlclist.xml onto your PC.

2c. Open dlclist.xml in a text editor.

2d. Paste this line at the bottom of the list:
<Item>dlcpacks:/GROANSPATCH/</Item>

2e. Drag and drop dlclist.xml back inside.