Dual Head + 2nd Graphics Card

Currently my setup is..

Matrox G400Max Dual Head graphics card connected to Monitor on VGA1 & TV via
VGA2 (using S-Video and DVDMax)

The problem I have is the computer above is used as a HTPC style computer. I
also have it connected to a projector but this is in a different room to the
computer. When I want to play stuff on the projector I have to start it
playing then switch round the cables connected to VGA1 to show it on the
projector.
Would it be possible to add a second graphics card which ran dual screen
with the Matrox card such that Matrox VGA1 & Second VGA1 showed the same
thing and then Matrox VGA2 ran S-Video usin DVDMax

Is this possible?