|I've yet to hear of a SOHO Router that you couldn't disable the DHCP on it. But, if there's no setting to do so, then there isn't. If that's the case, you could split the DHCP pool between the two routers or you could disable it on the other router and run it solely on the 2wire.|
If it turns out you have no choice, the best thing is to disable DHCP on the new router. A sinlge DHCP server is a lot easier to manage, and a lot less likely to cause problems as compared to having two. You do not want two trying to share out an identical pool of IP's which is why I recommended splitting the pool.
Just FYI, the "disable" setting is probably not on the main DHCP page. Look for a "general setup" page or , "basic setup" or something like that. In fact, check through all available setting pages. Alternatively, you could check in the manual, ti may detail how to disable DHCP.
It's my own personal prefernce in a case like this to have the DHCP Server service running on the router that's directly connected to the internet.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.