Netgear router and SBC DSL PPPOE

A friend of mine is having some issues with setting up his DSL with a netgear RP114 router. Everything goes great entering all the info's until that whole spoofing of IP of the original computer with the signon and password stuffs are entered after that there is no pinging of IP's, no internet connecting, it's like the network falls in on itself and just goes away. All machines are running XP Pro and work great when the original computer works as the gateway sharing the internet, etc. I thought at first he may just have a bad router but testing on a cable modem proved different. If any one has some tips or experience with this scenario, or if you need more info let me know. One more thing I probably should add, each unsuccessful time the router was installed and summarily uninstalled a repair of the network connections had to be performed on each machine.

Heres what I got initially from Netgear:
General Setup
Host Name = Put in the name of your computer provided to you by ISP (This may be called a computer name or host name by your ISP). You may need to verify this with your Internet Provider, normally it is the email name without the @Ameritech.net

Domain Name = Leave Blank the router will get this on its own.

ISP Parameters for Internet Access
Encapsulation = PPPoE

Service Type = Blank

User Name = your user name you use to log on to service.

Password = your password you use to logon to service.

Idle timeout = 300 Seconds
WAN IP Address Assignment, DNS Server and WAN MAC Address
Wan IP Address Assignment = Get Automatically From ISP (Default).

DNS Server Address Assignment = Get Automatically From ISP (Default).

Wan Mac Address = Spoof This PCs Mac Address – IP Address 192.168.0.2 This IP Address should point to the IP address of the computer that was originally connected to the modem.

This is where the headaches begin......

After connecting the router, did you power cycle the modem?

Sorry for the delay,
the modem was cycled on each consecutive try, did I mention there is an 8 port hub involved with this configuration? If not, I apologise as it was very late when I posted to the forum.

After much head scratching and alot of research we got it up and running fine by removing the second NIC from the computer used as the gateway not just disabling it.
Just one more question here. How does the DMZ work with routers when hosting, let's say a game for instance, on the internet. Is this the easiest method or is there better?

DMZ leaves the PC wide open to attack, as you have no firewall protection.

Taking the time to configure the incoming/outgoing ports and protocols within the router is time well spent, IMHO.

Happy gaming!!

Thanks for the info, I figured it had something to do with being labeled demilitarized zone.