How can I re-enable the onboard graphics card Please Help

This question is related to a previous post in the hardware section:…mp;#entry954420

I have just bought a new graphics card on which I wanted to do some parallel processing. However when I install the card my bios automatically disables the onboard card and uses the new card for the graphics, I don’t want this but I cant change it in the bios as my bios doesnt allow you to specify which is used.

Is there a card that I can use that isn’t recognised as a graphics card, I have heard that maybe the PhysX card will not be recognised as a graphics card and therefore not cause the disablement of the onboard graphics card.