For Fivem:
Copy folder :"e_49_church" from FiveM folder in archive into your server's resource forlder and add in your server.cfg "start e_49_church" line

For Single player:
Drag and drop the folders into your modded dlc folder (GTAV>mods>update>x64>dlcpack), next navigate to your dlclist.xml located in GTAV>mods>update>update.rpf>common>data), and inside dlclist.xml scroll to the bottom and add line like this "<Item>dlcpacks:/"e_49_curch/</Item>"

For RageMP: copy folder from RageMP folder to %Rage_mp_folder%\server-files\client_packages\game_resources\dlcpacks (1.1 version) or in %Rage_mp_folder%\server-files\client_packages\dlcpacks (0.3.7 version)

Thanks for using this interior!