Apache configuration question - AuthUserFile

[stodge]

I'm running Subversion and Trac, SVN through webdav. Subversion repositories are stored in /srv/svn and Trac projects in /srv/trac. Trac projects and SVN repository pairs share the same name, so:

/srv/svn/support
/srv/trac/support

I currently have one password file in /srv/.htpasswd, which means all developers can access all projects. It's not a huge deal as it's for internal use at work, mostly for prototyping.

At some point I'd like to re-configure it so that I can control access on a per project basis. I've written some custom Python scripts that automate most of the work in creating Trac projects and Subversion repositories, to save me lots of typing!

So /etc/httpd/conf.d/subversion.conf is:

 <Location /repos>
 DAV svn
 SVNParentPath /srv/svn
 # Limit write permission to list of valid users.
 <LimitExcept GET PROPFIND OPTIONS REPORT>
  # Require SSL connection for password protection.
  # SSLRequireSSL
  AuthType Basic
  AuthName "excds"
  AuthUserFile /srv/.htpasswd
  Require valid-user
 </LimitExcept>
</Location> 

My problem is that each time I create a new Trac project/SVN repo pair, I don't want to modify existing Apache's config or create a new .conf file. I absolutely want to avoid having to restart Apache to re-read configuration.

I know I could use authz,but again that relies on specifying a different password file for each Location in a .conf file.

Is there anyway to get what I want without modifying Apache configuration and without restarting Apache?

Thanks