I'm going to start keeping a sticky here with links on how to reconfigure your ISP supplied modem/router/gateway appliance...so that you can use your own router instead. Basically instructions on how to reconfigure the ISP supplied appliance to a pure "bridge"...so that your router will do the PPPoE and NAT.

Verizons Westell units...
http://onlinehelp.verizon.net/consum...inksys6100.pdf

Westell
http://www.dslreports.com/faq/9687

2Wire Gateway
http://shastademo.2wire.com/
Advanced > Configure Services
uncheck "Enable Routing"
click "Submit"

Comcast SMC
http://www.handymanhowto.com/2011/08...ic-ip-address/