Help Using Vpn To My Server Whs 2011 Guide

I am using the VPN to my Server guide and have a question concerning the step that says "select your range of custom IP addresses that are unique to your network that aren't in the DHCP pool" 

My Motorola SBG6580 cable modem/router has an IP of 192.168.0.1 and supports 253 CPE's, What range of IP would I put in the blocks?

Thanks,

Skip