Easy IPChange
Quick and easy command line tool for changing an IP address
... for the XP command interpreter however is forwards compatible with any current windows OS (Win7 & 8 may need to 'run as admin').
Changing your IP Addy is as easy as:
IPCHANGE /IP 192.168.0.2 /MASK 255.255.255.224 /DG 192.168.0.1
IPCHANGE /DHCP
Easy IPChange is the best free IP Changing script out there so check it out! If you don't like it - tell me about it...and if you do - Win Win!
Check out the Youtube vid
http://www.youtube.com/watch?v=nfee-10CaJk&list=UUq-H3HcL6KzIx2R7ApsNGrA