Reverse Proxy for all requests - except images

I have tried everything and can't find a solution:


Using the Proxy Engine I thought it could work like this:
<ProxyMatch [^\.gif$]>
     ProxyPass  http://localhost:8000/
     ProxyPassReverse http://localhost:8000/
</ProxyMatch>

Using the Rewrite Engne i tried several variations of the below:
Something like the below 
RewriteCond %{THE_REQUEST} "[^(images)]" [NC]
RewriteRule .* http://localhost:8000/ [P,L]

All the above directives are in a virtualhost tag.

Thanks,
Mike Collins
Macromedia Product Support