Instead of firing up IE, I can run IE inside of Firefox with a nifty little add-on called IE Tab. Once installed I tell IE Tab which sites to launch in IE. See screen below.
One thing to keep in mind, if you have other add-ons such as Mouse Gestures installed (my favorite Firefox add-on) they will not work in IE Tab. This isn’t a big deal, but I used to add MSNBC to IE Tab until I realized my gestures wouldn’t work.
Here is Windows Update running under Firefox using IE Tab. Without IE Tab this would not be possible.