Squid as a Reverse Proxy for ISPconfig on the same machine

[RotHorseKid]

Hello All.

I would like to setup Squid as a reverse proxy for my sites which I administer with ISPconfig.
I am using SuSE 9.3 with the perfect setup.

I think by browsing this forum I already found out what to do, I just want to check back to make sure my idea is not completely braindead:

1. Change make_vhost() in /root/ispconfig/scripts/lib/config.lib.php so the sites get created on a different port (say, 8080)
2. Change /etc/apache2/listen.conf so the webserver listens on port 8080 for all my IPs
3. Change /etc/apache2/vhosts/Vhosts_ispconfig.conf so that the existing vhosts listen on port 8080
4. Install and configure Squid with httpd_accel_port set to 8080 and listening on all my IPs

Please let me know if this approach makes sense. Did I miss anything?
I would also appreciate any insights on if and what problems with updating this creates.

Regards,
RHK