[Opserty]

I think you are misunderstanding the concept of the Hooks & Plugins system. The system was purely put in place by vBulletin in order to make it easier for coders to modify code.

When you create a Plugin you hook it into existing vBulletin files, this means you don't need to edit the file directly, making it easier for people to maintain their boards when it comes to updates e.t.c. (Such as if files are overwritten it means people don't have to go back and edit the file each time).

If you are not using a default vBulletin file there is no need to use the Hook and Plugin system. You have control of this file so you don't need Plugins, you put your PHP inside your PHP file. Using the Plugin system is pointless, you have a custom PHP file so you should use it. I'm not sure why you are using a providers_hook.php page as you don't even need that, you just need to put that code into the main PHP file.