Great that it worked... personaly I never bothered trying out this as I had a tower just waiting to get used but impressive, a tad bit sad that I sold the Prom now that I see that it actually work in a A4000D.
A few comments... the network connector should be at the back (possibly on the same backplate as the voodoo card), the network card should be one of them newer ones that are tiny and sleek because as it is now it looks like the 2nd and 3rd PCI slot is next to impossible to extend and with such a card one more PCI slot would be freed up. Not seen on the picture but most likely there is some isolasion fo the top PCI card so it won't short against the top of the case. I'm concerned about heat though... does it run hot already? and what then when scandoubler and 2 full length Zorro cards get in there aswell?