Dial-up networking

Hi techs. I tried Dial-up networking in Windows 2000 to give my peers dial-up access to my DSL internet link. However, dial-in clients could only dial in successfully using one of the 12 IP addresses I have in my cyber cafe (10.0.2.50 to 10.0.2.62).What can I do to enable clients use other addresses apart from this? When i use win2000 server, I can’t specify the adddresses for the clients the way I did in 2000 pro. What range of addresses can I use with respect to my above IP addresses? Thanksfor cooperation.