[CentOS] binding additional IP addresses to centos6 on one interface

I know this was discussed before, and I have seen a million ways of 
doing this via online docs. I have a quick question that hopefully the 
community can help me out with

I am trying to add a block of 10 IP addresses. Rather then create 10 
different alias files, I want to use the RANGE file.

Docs say to use the following format:
IPADDR_START=x.x.x.x
IPADDR_END=x.x.x.x
CLONENUM_START=0

If the IP's that are given to you are on a completely seperate gateway / 
netmask, how would you enter it into this file? Is it necessary? Please 
advise.