[BirdOPrey5]

Cool... The actual code of the function may vary from version to version, the important thing is to find the function:

function handle_bbcode_img_match

And then add the hook right before the return line...

($hook = vBulletinHook::fetch_hook('bbcode_img_match')) ? eval($hook) : false;

So actually I don't think the code you posted is right, the hook needs to be above the return line.