This is a very faint hope, but I have some documents I did many moons ago with embedded diagrams. Don't suppose there's any way you can take a picture (png format) and import it back into Visio to make some modifications? I lost the original visio diagrams when my TeraStation bit the dust, and the embedded pics in the docs are all that remains of them...
I know my future contains some Visio work (which I hate), but I just thought I would give it a try :-) Cheers, JR Sent from my Blackberry, which may be an antique but delivers email RELIABLY

