Directing all traffic, except in a list

[tomdelonge]

I just use a few lines of code like this:

 

RewriteRule AboutUs/ /aboutus.php [NC]

RewriteRule ContactUs/ /contactus.php [NC]

 

Each page I have is listed that way (I only have a few pages, so it works fine.) However, I would like anything that is not in the list to be directed to an error page, which I'll create myself.

 

So the code needs to say something like, if it's not one of these, then go to example.com/errorpage/ which really points to error.php

 

How do I accomplish this? I'm not great with mod_rewrite, it took me awhile to get the first part working. Thanks for your help.