>Well, controlling the time the COM servers are held in memory is what I'm trying to do. Where do you set the "corresponding setting for your objects in IIS"?

Oops! Read "MTS" instead of "IIS".

Right click on the your package and choose Properties. The property is in the Advanced tab, "Shutdown after being idle for ... minutes". The minimum is 1 minute. (Zero means never.) However, if you go directly to the registry where this setting is saved, you can set it up to the second.

From my experience, this setting is not very reliable. If you just need a fast way to release your dll from memory, install the Windows Resource Kit. It contains a kill.exe tool. It can be used to kill any process. So, to stop the IIS:

kill inetinfo

Vlad