>How do you add a "Quick Launch" icon for the desktop to the task bar?

If you're asking how to place a shortcut on the Desktop, locate the Desktop SpecialFolder (it's a standard entry reachable with Wscript.Shell) and create the shortcut there (Wscript.Shell has a CreateShortCut method.)

If you're asking how to add an entry to the Quick Launch bar, locate the AppData SpecialFolder; if ActiveDesktop is installed, the Quick Launch folder is beneath that in \Microsoft\Internet Explorer\ Quick Launch