Vista: Network drivers - use NDIS 6.0 whenever possible

I didn't know there was much importance in this until I came across this paragraph in a Microsoft whitepaper on driver compatibility:

NDIS 5.x and earlier drivers must go through a translation layer. Windows Vista supports NDIS 6.0. NDIS 5.x and earlier drivers run in Windows Vista, but they do so by translation to NDIS 6.0. The translation layer can significantly reduce driver performance.

Solution: To avoid the translation penalty, port NDIS 5.x drivers to NDIS 6.0.

For more information, see the white paper titled "Porting Miniport Drivers to NDIS 6.0.” In the WDK documentation, see also “Introduction to NDIS 6.0” and “Porting NDIS 5.x Drivers to NDIS 6.0.”

It also looks like some NDIS calls have been removed completely from Vista which can also make older drivers fail.