HELP - Dynamically configured mass virtual hosting

Hi I would like to have Apache2 (on freebsd5.1) to serve like so:

requests sent to here: http://domain.com/file

Are routed here:

/home/user/site/domain.com/file

So I do:
VirtualDocumentRoot /home/*/%0 ## This is in the httpd.conf file, but it
doesn't yield results :-(.

So how can I get this to work?

Rach