Hi:

There is no need to immunize Firefox, since it does not utilize activeX controls.

JavaCool's SpywareBlaster is a better utility for "immunizing" IE than Spybot, as it
uses a larger database. It also provides a blocker for tracking cookies if you use
Firefox, a feature Spybot lacks.

SpywareBlaster is cool ... also, check:

https://netfiles.uiuc.edu/ehowes/www/resource.htm

and

http://www.mvps.org/winhelp2002/hosts.htm