Pxe boot z90

Pxe boot z90

Hi All,
I have been trying to get PXE to work with our Z90 ThinClients for a few hours now. When I boot these units into our VISTA based PXE menu, it gets stuck on the network driver. I have looked up what driver it has and installed it, but still no luck. I even took the WIN7 driver that came on the unit and injected it, but still no dice. Any ideas would be great...

Thanks
Tyler