Looks like it's not "5 static IP addresses on 5 devices behind DSL modem in Bridge Mode", but 5 addresses behind PPPoE. If so, you need only one PPPoE connection on one of the routers (1), also ...

How to Configure a D-Link Switch for a Static IP Address. When a network router doesn't have enough network ports to connect all the necessary devices, a switch can be used to add additional ports.

It can come in handy when you want to configure features on your router. You’re probably familiar with an IP (Internet Protocol) address, one that uniquely identifies your computer, phone, or ...

This short tutorial walks you through the process of changing a CentOS ethernet interface from DHCP to static--but be prepared to type.