It's a real SOB to get rid of. I ran the usual Adaware, spybot and the hijackthis to rid my pc. I also use symnatec 2004, but not sure what that did to help. I ran each program more than once. Its been awhile, so I don't recall all the details other than I had to hit the web and it took me a couple of hours. Think you'll find some instructions in a google search.
I also went through my registry for instances of Isearch, but they use IP adddresses too and there was anotherURL involved. Can't recall it now without doing some research. I almost pulled a rebuild. MOFOs
Good luck with it.
BTW, I called them several times when the unistall did NOT work. Just voice mail that was never returned. They did not return email either. I called several times just to stick it back at them. Also emailed the admin as listed in whois.
It's shit like this that really pisses me off! Why the fuck would they do this, does it really make money or just piss people off?