For example, I want to uninstall an application on a users PC whilst they are logged in, but they do not have the rights to do so in the "Add/remove Programs" application. Is it possible to use "Run as..." for Control Panel based applications so that I can open the application as an Administrator?
You can use the
It will prompt for a password then launch Add/Remove Programs with Administrator's credentials. There are other control panel applets you might need to launch this way as well.
You can also hold shift while right-clicking the applets and most of them allow you to choose "Run As".