Change the IP address all the website IIS 6.0

Start > Run > cmd

Then type
cscript.exe iischangeip.vbs OLD_IP_HERE NEW_IP_HERE

In my case, i run

cscript.exe iischangeip.vbs 213.5.154.40 213.5.154.60

213.5.154.50 was old server IP.
213.5.154.60 new server IP.