I thought I had found the reason why some users were experiencing problems installing Snow Leopard Server guests in VMware Fusion on late model Macs. I was wrong. What I learned today was that I had made a subtle error when I created the disc images of Snow Leopard Server install disc. The images I created appeared to startup correctly, but then failed before the installer window appeared.
If you use Disk Utility to convert your Snow Leopard Server installer DVD to a disc image file, you must select the DRIVE icon, not the disc icon below it. That applies to any DVD or CD that you convert to a disc image file, of course.
dariusd created an illustrated step-by-step guide which shows the correct procedure to create disc image files from DVDs here: