Change default sharedip page

At the moment, my server is only accessible via ssh tunnel. The server's domain name points to an IP which is not accessible outside the firewall. So users create a tunnel from localhost:88 to myserver.xx.xx:80. When they browse http://localhost:88 they only get the shared IP page. I know there is a solution involving modifying the hosts file, but I don't want to make users have to go through yet another hoop.

I would like one of my sites to be the default seen when browsed via ip address. To do this, I changed the sharedip section of /etc/apache2/vhosts/Vhosts_ispconfig.conf to point to one of my sites and it worked but it was overwritten after a while.

The next thing I might try is making /var/www/sharedip a link to /var/www/web2/web. The problem with that is Vhosts_ispconfig.conf does not give the parameters I want for the site such as DirectoryIndex and Files sections for php.
Should I bother trying to put all that stuff in a .htaccess file or is there some easier way to do this?