Bro.You need this Program its an Ip Changer and the best feature is that u dont need reboot.
IP Changer 2.0
IP Changer 2.0 doesn’t requires system rebooting when you change desktop or notebook’s TCP/IP even though your system’s OS is windows 9X or ME. It can change
your desktop’s network setting only by one-click and also supports static IP and DHC