Editing "vbulletin Message"

[Noosphere]

I'm hoping to edit/expand the language in the default "vbulletin Message" users get when they try to access a page for which they lack sufficient permissions:

vBulletin Message

fred, you do not have permission to access this page. This could be due to one of several reasons:

1. Your user account may not have sufficient privileges to access this page. Are you trying to edit someone else's post, access administrative features or some other privileged system?

2. If you are trying to post, the administrator may have disabled your account, or it may be awaiting activation.

I've found where I can edit some of the individual variable phrases in the STANDARD ERROR template ...

<div class="smallfont">$vbphrase[not_logged_no_permission]</div>
<ol>
<li class="smallfont">$vbphrase[not_logged_in_fill_in_form]</li>
<li class="smallfont">$vbphrase[may_not_have_sufficient_privileges]</li>
<li class="smallfont">$vbphrase[administrator_may_disabled_account]</li>
</ol>

... but nowhere that I can work with the language as straight text. I'd like to be able to tweak the existing language, add or subtract a sentence, etc. Is there such an interface? A nudge in the right direction would be much appreciated.

Thanks in advance.