It is pretty easy to change the title. I needed to do it a while back. (A browser instance was being closed by another process, and I needed it to stay around for my testing.) Unless you really need to alter the title, I would agree with Lynne. Maybe you can log or control your tests in a less invasive way.
if you need to test with less number of users, i have an option...
On Right clik on IE menu bar, u will be listed with multiple items such as standard buttons, address, links, lock, yahoo ....
With the help of these options create a matrix with respect to user and IE look and feel.
User 1 - only Standard Buttons visible
User 2 - Only Address Bar visible
User 3 - Only Links are visible
USer 4 - Std Button and Add Bar
User 5 - Add Bar and Link
and so on... Next time.. When u refer to the application screen shot or toggle applications with diff users.. u can distinguish [img]images/icons/smile.gif[/img]