I'm not sure if I just saw this in a fever dream or not.. But I swore I saw a while ago a blog post where someone pointed the 'insert your windows CD' dialog to a http address and pulled the appropriate data straight from the web.

From memory the address looked surprisingly legit (like a TechNet or Sysinternals server) and I thought 'how awesome, I'll remember that.' 

Well.. I didn't.   I forgot it.  I was wondering if anyone around here knows what I am talking about/has ever seen that done/can verify my sanity/knows the address that can be used.