d-Link DSL-G604T and cable modem - won't work?

I've been struggling to help a neighbour for weeks now and I'm stuck,
possibly terminally.

She has an cable modem from [UK cable giant] NTL. Her son's Dad bought
him a laptop and Dlink wireless router, but it's a G604T. After
struggling for hours with this thing I found this on the Dlink site:
http://www.dlink.co.uk/?go=jN7uAYLx/...YoNJIhN6Ng7g==
"As this router is an ADSL router with a built-in ADSL modem, it is not
capable of working with a cable connection."

Is this true? I now believe that to share a cable modem you need to
clone the computer's MAC address so the router looks like the original
PC. I think the problem with this router is the absence of MAC address
cloning. Am I right? Is there any other way?

The cable modem can be connected via USB to the main PC, and I can
share the internet connection outwards via the NIC to the router, but
this is far from ideal as it requires that the main PC be powered up to
route all network traffic to and from the laptop, which I was trying to
avoid.



nicandal