Out of curiosity, did you look into using something like IETab? You can configure it to render specific sites in IE's Trident engine, and all other sites using

Out of curiosity, did you look into using something like IETab? You can configure it to render specific sites in IE's Trident engine, and all other sites using the usual Gecko engine. However, I'm not certain how easy it is to push a Firefox extension + configuration to a large number of Windows machines.