In case anyone else hits this point... fairly easily solved in the end-
Installed as per instructions on http://wiki.linuxmce.org/index.php/Installing_1004
On reboot, AVWIZARD (I assume) comes up but is just a noisy screen of messy pixels with a few pixels that move as you move the mouse.
Simple solution, in my case- press "6" to set the resolution and hey-presto, a visible AVWizard!
1004 install went smoothly! Thanks very much guys.
Please add this information to the AV Wizards wiki page, or add a new page detailing your tip
This happens because the default AVWizard screen is assumed to be pushed over an HDMI connection for a Media director, virtualbox and VGA connections will show the pixelated screen, this was done to make it easier for setting up MDs without lugging around a monitor and keyboard.
Good to know, thanks, that would explain it. I've since wimped out to 8.10 but the days of 10.04 are coming again.