Q: how do i remove mackeeper helper

Use the instructions in this article - http://support.apple.com/kb/HT4650

Best of luck. Those so called "helper" applications and virus "defenders" are the bane of Mac users' existence. Avoid them like the plague in the future.

That link is not for "MacKeeper", but for Mac Defender.  Here is the link to remove MacKeeper: http://applehelpwriter.com/2011/09/21/how-to-uninstall-mackeeper-malware/

Actually the article noted will work with most malware of this type. Possible your article will work as well.