Please stop using Internet Explorer 6. It came out in 2004, is riddled with bugs and forces developers that want to use cool tools like MooTools write CSS and HTML hacks that make me cringe.
I understand you are fearful of change. I get it. Don't upgrade to Office 2007. Doesn't bother me at all. Don't upgrade to Vista. Heck that OS compelled me to switch to a Mac. I also understand that your IT support staff is not prepared for the onslaught of calls due to the ribbon replacing menus in Office 07.
But the whole goal of Internet Explorer 7 was to be more secure (i.e. less for you to worry about). Especially now that it's been out for 2 years. Also, it's a browser, so it won't crash your network or cause a flood of calls to your IT support center.
In conclusion, this is my plea to you corporate America, to do what's best for web developers everywhere and upgrade to IE7 already. The world of tab pages and standards based CSS support awaits you.
Sincerely,
Brian Schwartz