Setting up symlinks for previewing site

[cmonnat]

I'm looking to setup an account on our Plesk server that makes it simpler to preview sites through an easy to remember address.

I've setup a hosting account in Plesk for s3.practisinc.com. I would like to configure things so that by making a symlink in the web_users directory of s3.practisinc.com I am able to access other sites hosted on the server by visiting:

http://s3.practisinc.com/~domain-name.com

I have been working at this for a while without much success. So far, I have created a vhost.conf file in the conf directory of the s3.practisinc.com site with the following commands:

<Directory /var/www/vhosts/s3.practisinc.com/web_users>
    Options Indexes FollowSymLinks
</Directory>

<Directory /var/www/vhosts/s3.practisinc.com/web_users/* >
                Options -Includes +ExecCGI
                AddHandler cgi-script .cgi
        <IfModule sapi_apache2.c>
                php_admin_flag engine on
                php_admin_flag safe_mode on
        </IfModule>
        <IfModule mod_php5.c>
                php_admin_flag engine on
                php_admin_flag safe_mode on
        </IfModule>
</Directory>

After creating that file I run the websrvmng command to restart the services. It looks like it should totally work, but when I try to visit a site on the server after creating a symlink I am getting a "Not Found" error.

Anyone have any ideas on what I'm doing wrong?