wireless router to network

Hi we have a wireless network setup where a Cisco router is being used as the dhcp server.
I want to add another wireless router to this network. How do I program this router so that it will not issue out the default IP addresses of 192.168.1.xxx. The network is already using a IP of 10.1.1.xx range.I need help in getting this done so there won’t be a conflict with the IP addresses please. Thanks