Multiple Hardware, need diffrent ips

I am running windows 2000 pro on my laptop, and have to change my ip address everywhere i go, i thought if i made profiles for all sites, entered the info once, then it would be saved, and wouldnt have to change it again. But this did not work, I still have the same ip for all profiles. Anyone have any ideas, tips or suggestions for me to try please.

Thank you

Trevor