I hate all tech support. But, for what it's worth, I needed NIC drivers yesterday for a DELL and their site only had the usual suspects (Win 98, 2000, NT, XP). I needed NDIS DOS drivers so I could make a network boot disk for Symantec Ghost. I opened up a chat session with a tech and she immediately linked me to the XP drivers I'd already seen on the site. I told her that they were for XP and she said, download the file and unzip it and you'll see a folder in there with NDIS drivers.
I was fairly impressed. This seems WAY beyond what the average PC tech support person would know, or even understand. Most have probably never heard of DOS.