For those of you too nostalgic for your IE, this is for you.
First install Firefox. www.getfirefox.com
Then go here and install the IE5.0 theme. Your browser will look IDENTICAL to Internet Explorer but you will have all of the awesome features and security of Firefox!
http://mozfly.sitesled.com/
Oh, and using the IE Firefox theme posted above is a great way to ween existing IE users off it slowly.
I installed it for my dad and changed the Firefox icon on my desktop to the IE icon and he never noticed.
When I showed him the tabbed browsing, he loved it.