DHCP range in Network Manager

[Andy Ringsmuth <andyring inebraska com>]

I've got a new, totally clean Ubuntu 9.04 box I'd like to use as a  
basic network gateway.

I've got it set up with NetworkManager with eth0 connected to the  
Internet and eth1 as the internal interface to which other computers  
on my network will connect.

My question is this - the default range IP range dished out by  
NetworkManager is 10.42.43.10 to 10.42.43.254.

I would like to change that to 192.168.1.10 to 192.168.1.99 but for  
the life of me I cannot figure out what to change to make that happen.

Thank you very much for any help.

-Andy