I believe I have done this correctly. Via the web UI, I go to Network, and under LAN Settings, I've filled in the Use custom DNS servers field with 2 IP addresses from OpenDNS.
From a client's perspective, I'm getting the Router's IP address (10.10.10.254), which might be fine, but then it doesn't appear as though the A+ is using the OpenDNS addresses because when I type in a nonsense domain name, I am still getting Verizon's dumb searchassist service, which I do not want. When I go into advanced, and look at the interface config page for the WAN interface, on the Advanced tab it shows to ignore the advertised DNS, and use the custom 2 addresses I supplied.
Is there more I need to do??