Https Webmail domain for Squirrelmail

[Up2NoGood]

Good Morning All

I have a question that I hope someone can help with. I have just installed Debian 5 with ISPConfig 3 as the control pannel. I previously had Ubuntu 8.04 LTS with ISPConfig 2 that i was happy with but just wanted an upgrade.

I follwed this HOWO by Falko "The Perfect Server - Debian Lenny (Debian 5.0) [ISPConfig 3]"

Firstly may I say what a great HOWTO, worked first time with no errors.

Currently Squirrelmail is accessed by the normal: Http://yourdomain.co.uk/webmail

I would really want to access it via Https://webmail.yourdomain.co.uk please can someone point me in the right direction as i really dont want to mess around too much with the server configuration as i have just got it back up and running after a week of struggles with Ubuntu.

I look forward to hearing from you.