If you can see the device as plx technology. Then I can see no problem why, with the right software, that it would not work. I am having the issue where I cannot even read the card is inserted into the motherboard. I would like to know which motherboards you tried where the card did not show up on the pci interface vs where they did.
And if by chance you are still on this project, and plx technology shows up as a pci device, maybe I can assist you in getting it working.