Hiding a particular PCI Function from device manager

Hi,
My Device has three PCI functions, each function work as a independent
network card. In the scaled down version of my device I just want to give the
user only 1 network card. But since the same hardware is being used all the
three interfaces are coming up in device manager. If I fail the
initialization in the interfaces which I want to hide (e.g. I just return
success for function 0, and fail the initialization in function 1 and
function 2), the interfaces then come up in the device manager with yellow
bang.
Is there any way that I can hide the other two pci functions.
Is there any way I can install some null device on those particular
interfaces.
I would appreciate any help in guiding me.
Regards,
Sanjeev