It says 7100 at the front of the iso file so it should be 7100. I have also just downloaded it from Microsoft and will install on a virtual machine just to check!
@Mike2k9 - Well spotted I hadn't noticed that, I was too busy looking at the IP stuff, or at least that's my excuse!
You're right without a valid MAC it's never going to work so must be a driver issue. Something tells me that it's unlikely to get fixed by Netgear given it's an old card, so unless Microsoft come up with something I doubt there will be a fix.
@Mike2k9 Actually just thinking about it the guy who posted that info says later on that his is the V1 card not the V2 as written. Which would probably explain the driver issue as that driver is clearly for the V2 (since the description states V2!). He also said that there isn't even a Vista driver for the V1 card.