I think virtualization is enabled in the BIOS as I have another VM NAS appliance that I was testing (but decided against) and that was able to run very well.
I've just changed the Linux options... I tried Debian 64bit, "Other Linux 64bit", Ubuntu 64bit, Linux 2.4 64bit, and a couple of the other 64bit options available. Each one fails at the same place. I've also re-downloaded/converted the IMG/VDI file and tried previous versions - but no joy.
-- Any other ideas/advice please??