[jchamber2010]

This might or might not work, but add that line to another file like the bottom of global.php, then you could use

PHP Code:

if ($vbulletin->userinfo['userid'] == 1) {
    // enable debug mode for only my USERID
    $config['Misc']['debug'] = true;
} 


Modifying vBulletin core files as described in this post is extremely in advisable.
Modifying core vBulletin files will result in loss of official support from vBulletin.com.
Use the contents of this post at your own risk!