Change Forum Display On Index

[lostincable]

I am trying to limit the forums that are displayed on the index. I want to have only one forum listed on the index page and the rest removed.

I know this can be done by hiding the forums in the acp but I would like them to be physically removed from the index not just hidden. I believe this would be done by changing
"forumdisplay.php" to only display a selected number of forums, again I would like to do this within the code of vbulletin and not the database.

I have looked at the following files,

function_forumdisplay.php
forumdisaply.php

And I am sure there is a way in the code but I am not a programmer so unable to determine what to change to limit the forum id's it draws from the datase.

Again I would like to do this through the code of vbulletin and not the database.

Any one have any ideas?