Rewriting image directory for a dynamic subdomain

[eluser]johncook[/eluser]
I'm having htaccess issues. I want to rewrite subdomains so that:

http://subdomain.domain.com/ rewrites to http://www.domain.com/page.php

I also want to rewrite the subdomain's image directory into a subdirectory in the main images directory. For example:

http://subdomain.domain.com/images/pic.jpg rewrites to http://www.domain.com/images/subdomain/pic.jpg

To do this, I used the following htaccess code:

Code:

# rewrite any subdomain non-images to page.php
RewriteCond %{HTTP_HOST} !^www\.domain\.com [NC]
RewriteCond %{HTTP_HOST} ^([a-z0-9_-]+)\.domain\.com [NC]
RewriteCond %{REQUEST_URI} !\.(gif|jpg|png)$ [NC]
RewriteCond %{QUERY_STRING} (.*)
RewriteRule ^(.*) page.php?%1 [L]

# rewrite any subdomain images
RewriteCond %{HTTP_HOST} !^www\.domain\.com [NC]
RewriteCond %{HTTP_HOST} ^([a-z0-9_-]+)\.domain\.com [NC]
RewriteRule ^images/(.*) images/%1/$1 [L]

Any html or php pages redirect fine but any jpg or gif files generate an Internal Server Error. Any tips on what I did wrong?