According to this document, the router you have is a full featured router:
http://www.2wire.com/pages/pdfs/106.pdf
You should be able to hook up your network like this:
Modem
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2Wire Router
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---- Ethernet Device
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---- Ethernet Device
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---- Ethernet Device
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---- Ethernet Device
The ethernet device can be computers, printers, switches/hubs or whatever. It cannot be another router unless that router has had its DHCP function disabled. You mention another ethernet hub, are you sure it is a hub and not another router?