How to add additional IPs to DHCP server

1. Copy current files (/etc/dhcp.conf, /etc/bind/xxx.hosts, /etc/bind/xxx.rev) to a *.sf extension
2. Edit /etc/bind/xxx.hosts
   Add more guests...increasing IP number
   Bump serial numbers
3. Edit /etc/bind/xxx.rev
   Add more guests...increasing IP number
   Bump serial numbers
4. Edit /etc/dhcp.conf
   Increase IP range to match the number of guests that were added to the above files