IP HELP for MINECRAFT!! :(

im Ip banned on a server so i need help to change my ip to go back on it.
its a really good server but now i need to change my ip.

can some one tell me how to change my ip

my computer is
windows vista

also my ip is a static ip i think.

plz tell me how to change my ip so i can go onto a minecraft server im ipbanned on. plz help