1. Download your resource from FiveM's Keymaster.
2. Unzip fs_icebox.zip folder and place it into your resource folder.
go into install_me_first folder then items folder and install items according to your inventory system and also pictures into your inventory
follow this link :
https://youtu.be/xmCRAiZzyPk
go into config file and set config according to ur need
Congratulations, you've successfully installed the resource. Restart the server and you will be all set.
