PHP NET and a frame work for a help Support system

Hi, I am a php programmer for a large ISP in little old NEW ZEALND. I would just like to say that you site is great. My question is how does your site run - I was wondering what the structure of the your site was as it is a very very nice interface as I have been looking at building an on help system fro our ISP support where the help desk and select individuals can post to the system. Do you have any ideas I of where to look or what to look at, I am looking for open source and before I sit down and just code one I was wanting to look about the place at a few systems..My initial idea was to take a webblog software and turn that into some sort of help system. Another thought that I had was to use the Microsoft engine and turn it into t web page but this becomes very time consuming when wanting to add more into it as you can not edit the notes online. Any thoughts are directions fro me to look at would be much appreciated. My latest project has been to write a WEBMAIL Interface for DBMAIL ( mysql raw mail store ). I have used php and a lot of the pear libs to get this up and running and it is nearly at a stage where we may release it to the world as an open source Webmail interface for DBMAIL. Check it out if you like as some comments or ideas would be great ( we are get some designers in to theme the interface soon ) http://mail.hyper.net.nz/ Login: demouser Password: demouser U can also set yourself up with a spam free email account if you like as well :-) Regards Michael Hill System Developer Orcon Internet Limited 09 444 4414 http://www.orocn.net.nz/