Integrating own code into vBulletin

[miner2049er]

I'm sure there have been previous posts about this, but just took a look and couldn't find any. (Maybe folks can give me some search terms to use?)

I want to place a business directory ("yellow pages") as part of my forum, with a link in the top menu. How and where do I integrate my PHP code?

I would like it to be able to work as a standalone PHP page i.e. not having to cut and paste my PHP code into the vB admin interface every time I need to test it.

Is there some sort of PHP file available with all the other necessary vB stuff (header, footer etc.) with a place inside the file saying:

< insert your code here >

or another method, where I insert the name of my PHP code file somewhere, that then gets included in a vB file?

One way I thought of doing it, might be this way. Looking at memberlist.php, as an example, could I basically use that as a guide, and just insert my own code after the part where it says:

// ######################
// ### START MAIN SCRIPT ####
//######################

and then save it as say bizdir.php, and call that file?

Any comments, and things I should watch out for?

Thanks in advance for any replies.

Miner2049er.