For someone keep on in demo environment like I do will not want to keep on changing the IP address like this.
(the article in the above link can apply to Windows XP too)
I would like to use the below method which simplified 9 steps to just a single command.
netsh interface ip set address "Local Area Connection" static 192.168.0.10 255.255.255.0
You can use the same command for Windows XP but I have not tried it in Windows Vista.
Have fun to do more demo