Hi again Michael,

I have run the DXCapsViewer. I took the following steps:

1. Confirmed that desktop is showing 1024*600 @ 32-bit in display properties
2. Ran DXDiag which shows Direct3D = enabled
3. Ran the DXDiag direct 3D tests. DX7 is not supported. DX8 & DX9 tests pop up a VirtualBox message box which says "The virtual machine window is optimized to work in 32 bit color mode but the color quality of the virtual display is currently set to 16 bit. Please open the display properties dialog of the guest OS and select a 32 bit color mode, if it is available, for best possible performance of the virtual video subsystem." Checked display properties and it still says 1024*600 @ 32-bit. Despite the warnings, got spinning 3D cube for each test.
4. Ran DXCapsViewer. Under "Adapter Formats - Depth/Stencil formats" = nil entries. All Depth/Stencil formats lists are completely empty!

Not looking too promising :(