err, i think there might be a way to change it manually under my network places -- my newwork connections -- properties -- TCP/IP, i modded mine a bit so i can host my website without frequent IP changes (didnt wanna pay extra for Bellsouth to give me a static IP.) Also depends on your ISP, maybe they can change it for you.
Are you using broadband? A lot of the time you can reset your IP by unplugging your modem, leaving it unplugged for a while (like half an hour), then plug it back in. Or use a proxy, although that increases loading times condierably if you dont find a good server.
the easiest way to change your IP is to switch ISPs. or you could use a proxy for similar effects. http://hidemyass.com
yo this link is all u need to change ur ip works for me do this once then everytime u get banned just unplug ur modem im not a hacker or nothin just sumtimes when i play online i tend to use my mouth endin in bein banned http://www.pagecurve.com/forum/archive/index.php/t-19.html