The first step is downloading the resource in https://keymaster.fivem.net/asset-grants,it is important that you log in to the account with which you bought said resource, otherwise it will never appear.
2 - FILES
When you download the resource, you will see a .zip file which contains your resource
3 - SERVER.CFG
After Puting The script in Your resources Folder, You Need To Start it in your server.cfg
You Need To ensure The sd-iaaheist After es_extended