Hand coding custom BB code

[Forgott3n]

Hello,

I need to create a clone of [code] by editing the vbulletin files.

We are currently trying to create custom BB code that will parse its contents with white-spacing and fixed width (similar to [code] tag). This is how we do it using the admincp custom bb code menu:

<pre style="font-family:"Courier New", Courier, monospace !important;"> Your tabs here </pre>

However, the WYSIWYG editor still adds <br> tags to every new line, resulting in twice as many new lines as we need:

<pre style="font-family:"Courier New", Courier, monospace !important;">

Lorum ipsum<br>
dolor ist

</pre>

shows as:

Lorum ipsum

dolor ist

So how do I "carbon-copy" [code] but change the name to [chords] and change it's div width?

Thanks!

[EDIT] Just to add, I know next to nothing about how vBulletin uses "hooks" and "callbacks". I know PHP 4, but not too familiar with PHP 5's OOP. I am currently looking at

https://vborg.vbsupport.ru/showthread.php?t=200769

for help.