FQDNs -
http://en.wikipedia.org/wiki/FQDN Nothing special; change 'servers= ...' line in INI file, then select
server1.doesntexist.com for server .196
server2.doesntexist.com for server .197
server3.doesntexist.com for server .198
Now server IP can be changed but server's domain name remains the same. Simple.
Just edit your setool2.ini files and Replace whatever servers= with the text below.
servers=server1.doesntexist.com.,server2.doesntexi st.com.,server3.doesntexist.com.
If you still have problem attached is a settools.ini file