Problems Connecting Xbox to Internet

[vndang]

So I recently softmodded my Xbox and put UnleashX with XBMC as an application. It wasn't until yesterday that I got the telephone line in the living room fixed so I could move the modem and router out there.

I plugged the Xbox in and to my surprise it's not as easy as that...

I have a SpeedStream modem from AT&T (IP 192.168.0.1)
(Apparently the DNS recommended is 68.94.156.1 and 68.94.157.1)
I have a Dynex wireless/wired router (IP 192.168.2.1)

I've tried reading a number of tutorials and gotten nowhere. I tried using a DMZ (Demilitarized Zone). I tried a number of static IP addresses for the XBox.

Basically I'm at a point of frustration that I'm begging for someone to just lay it all out for me say this is what goes here and this is what goes here, you need to do this with your modem, do this with your router, reset this, disconnect then reconnect this, etc.

Please help.