Thank you at least for part of your previous reply Marco (I'll disregard the irrelevant bit)
As Catz mentioned - I've been investigating a GForge solution - and am waiting for some more details from various sources as to what is possible for this.
At the moment you would have to re-install from scratch to add the XMT panel... or alternatively - you may want to have a look at XOOPS Hack module which adds a similar back end