for help

I choose the ripe dabase software to setup a intranet nic and need not to connect to internet. After i install the server software, i find i can use "dbupdate" applcation program to creat a new person object, but i can creat a new domain or inetnum objects which ip ranges from 10.71.0.0 to 10.71.255.255 and domain name is nic.cnpc.com.cn. Can you help me?thanks by the way, where can i find some information about "networkupdate" application program and could i creat a "mntner"object by myself?