I have a 500E and would like to remove and replace the foglight/bumper brackets but they have the little roung pins with crimped nuts? If I take them off how do I get them back on and do I need a special tool. Please see links for picture ( I can't figure out how to post pics). Thanks in advance.

http://home.comcast.net/~fireice586/wsb/html/view.cgi-photo.html--SiteID-1231089.html

http://home.comcast.net/~fireice586/wsb/html/view.cgi-photo.html--SiteID-1231106.html