How to set up 2wire 2701HG-S DSL modem

I have a bank of 5 static IP address' from the cable company... xx.xx.xx.31-36 I CURRENTLY have the 2wire 2701HG-S dsl modem set up for Connection Type : Direct IP (DHCP or STATIC) and have manually entered our information of IP xx.xx.xx.31 mast 255.255.255.0 Gateway xx.xx.xx.1 Then I have the ROUTER set up to GET IP ADDRESS DYNAMICALLY FROM IP Which is working great.... The DSL Modem give me the .31 The router give IP address' to all the computers 192.168.1.100-150 bla bla bla HOWEVER, Here is my problem.... I want to put a SECOND ROUTER ONLINE and utilize my second static IP, my xx.xx.xx.32 to have a completely isolated second network (just think of it as a second company, or just take it for fact that I really do need to use that second static IP) So, I know I need to transfer the IP control to the ROUTER !!! I KNOW that in the ROUTER, that I need to set it up as "USE STATIC" and put the IP xx.xx.xx.31 mast 255.255.255.0 Gateway xx.xx.xx.1 IN THE ROUTER BUT - - - WHAT DO I DO TO THE DSL MODEM (how do I tell the DSL Modem, let the ROUTER ask for the IP address) Options on the "2wire 2701HG-S" include: Direct IP (DHCP or STATIC) PPPoE PPPoA or Routed IPoA I think I want to switch the DSL MODEM to PPPoE Is that right ???? I'm working in a business, and want to be as prepared as possible, and NOT guess, and fumble around...... Thanks for any assistance !