Funneling Apache requests into a PHP script

[ALundrigan]

I wish to funnel all apache requests to a directory into a single PHP file. I am currently acheving the desired result through the ErrorDocument directive placed in a .htaccess file. However, this does not allow search engine spiders and other services (like the W3C Validator) to read the pages, since it detects the 404 response header and aborts.

What I am trying to do is get all URLs of the format

http://www.domain.com/some/non/exist...th=querystring

to be handled by the 'index.php', which is already set up to take the address above and determine which page to build from the data and templates stored in the database.

Basically, I want it to work like the 404 error handler method, but without the automatic 404 header being sent to the client

Please advise on how I can achieve this without the use of mod_rewrite, since my server doesn't support it (I tried using it with some basic proven examples, and all I got were 500 Internal Server errors, so I assume its not installed)

Thanks in advance