I have a ready PHP Script to manage confixx 3.3 on an Debian Server.
Has an Customer Interface with an own Database / Own Webmailer / Own FTP Uploader / Tickest Sstem and some other fine features.
This script is totaly ready and was hosted on my old server.
Only things to do:
Install on new Server. There is no description.
So you must lok how it works.
I think no problem for anybody with good PHP knowledge.