2 Video Cards and Problems with FS2004 Seeing Them

Hi all...I recently had some frame speed problems and dual monitors that I have solved based on help from the kind folks on this site but now I have a new problem.I was getting slow FPS with my GEForce 2500 128MB (AGP)so I went and bought a Radeeon 9250 128 MB (PCI). When I had one monitor hooked to one card and another hook to the other FS2004 wouldn't recognize them in HARDWARE section. It would also only allow me to run in window view with no 3d stuff I solved this by having the two monitors hooked to the Radeon.....however I would eventually like to use both cards to run 4 monitors...outside view, GPS, captain instruments and co-pilot instruments.Is there anyway to get FS2004 to recognize the 2 different cards so I get use MAX views etc ?Appreciate anyone's help ? Many thanks....JB