Overview:
    We have a few computers run inside exhibits as kiosks to loop certain web pages.  Internet explorer has the most built in functionality to act as a kiosk, but the inability to zoom individual flash objects forced me to use Firefox plus 2 add-ons.
Internet Explorer Kiosk setup:
On a shortcut for internet explorer if you right click and add -k to the end of the target arguement so that it reads "*\iexplorer.exe" -k    You can get internet explorer to start under Kiosk mode. 

Drawbacks
1.   Internet explorer was surpressing the url of the flash video we needed to show at startup.  This made it difficult to create a shortcut for the startup folder to access.
2.   Even when I was able to get the specific url of just the flash video internet explorer's built-in zoom functionality only increases text size not the size of the flash interactive video itself.

Firefox Kiosk setup:
1.   Firefox does not have a kiosk mode built in like internet explorer so instead of altering a url shortcuts target line you have to install a kiosk add-on.  There are a few but I went with R-Kiosk.
2.   Firefox allows you to zoom flash objects but it will forget your zoom levels at each reboot so the Firefox add-on NoSquint.  This will make sure zoom levels aren't forgotten
3.   Set the homepage of Firefox to the url you're using and place a short cut in the startup folder of the computer.

Conclusion:
This solution worked for only a few hours before we had to make an addition.  The flash object was interactive and contained links to other web pages.  By the next morning the kiosk showed a web page that seemed completely unrelated to the original site.  I highly suggest that anyone using Firefox or internet explorer find an addon to reload the original url at a given interval.  ReloadEvery for Firefox allows you to reload after a certain amount of inactivity.  With these 3 add-ons Firefox has worked very effectively as a kiosk computer.