If so, then you must check out my newest favorite add-on, IE7Pro. This free add-on for Internet Explorer version 7.0 offers many additions, but I love it because of the proxy switching capabilities it offers. Once you have it installed, all it takes is CTRL + F9 and bam! Proxy on, Proxy off. It also has some additional neat features like the ability to restore your browser with all of your previously opened tabs, as well as offers a spell check for anything you fill out within web pages. Tons of other cool features as well. Check it out!