That is what I will be working on (router behind router).  I've seen a lot of step by steps, but most involve using the second router in bridge mode (don't want to do that).  I had everything working great with my cable modem.  Not sure why ATT has to be so difficult with their equipment.

If anyone can point me to a good step by step (can't seem to find the right one).  I would appreciate it.  Ideally I want to be able to see my itunes library hardwired to the 2WIRE 2701HGV-B when my Apple TV is connected to my Airport Extreme.  If not possible, I will have to move my 2WIRE and run another phone line.

Attempted diagram of network wires:

https://docs.google.com/open?id=0B-rja3jDlGo2ZWNkMDc5MjItMTIzYy00MjUzLTgyOGYtYzYxMjJlNTA1MGEw