I followed the procedure shown in this KB: http://www.terabyteunlimited.com/kb/article.php?id=303
I imaged a Ubuntu system using IFL 3.13.
From Windows 10 host running IFW 313, I created the VMDK as a virtual drive according to the KB
I then I restored the Ubuntu image into the VMDK using IFW.
I created the virtual machine from the VMDK using VirtualBox.
When I run the VM, I get "Error loading operating system".
I can attach an optical drive with an IFL/BING ISO image, and boot into IFL/BING.
BING shows MBR0 Linux Native, MBR1 Extended, and partition ------------ Linux Swap Solaris
MBR0 is active with standard MBR.
What did I miss?