You would have already read IIS support team’s blog about configuring IIS to send an additional header to the client which would make IE to run under EmulateIE7 mode. I would also suggest you to read this MSDN article which talks about the various IE8 display modes available, and their corresponding functionality.
It is a while that I wrote something as crazy as this one is. This is basically a windows service running in your web server which would tweet often about the heart beat of the web server and posts its status messages. For example, v1.0 of this application will tweet the below (you can configure the time interval on the config file):
In IIS6 manager, you see a green arrow icon and a red icon against the ISAPI Filter’s list to indicate if the ISAPI Filter is loaded or not. That was possible because FilterStatus metabase key was updated after the ISAPI Filter is loaded inside the process.