How to swap Icon of running Application in Taskbar (on Windows)

"I couldn't really find a good solution to this, but you could try the following:

Install Winstep

This gives you a Windows 7 like taskbar under Windows XP, but I believe it also lets you pick the icon you want to use for the application.

The problem you have is you want different instances of the program use a different icon, while the application gets its icon from it's program files folder. So the only option, except for running an alternative taskbar, is running three different 'versions' of the applications which all point to a different icon (which probably gives you a huge overhead)..."