IPADDR_START=216.73.xxx.xxx
IPADDR_END=216.73.xxx.xxx
CLONENUM_START=0
NETMAST=255.255.255.0


Name file ifcfg-eth0-range0 (or whatever the nic card is)
Also The start IP address is the 2nd ip address in the list, the End is the last of them.

Yes I stole this script/borrowed from Calpop. Actually one of the most useful things I got out of there.