I don't think WshShortcut is able to do that.
If you want to pin something to the Taskbar in Windows 7 you could use one of the Pin UDF's.

UDF Library » PinTo() - Pin Shortcuts to the Start Menu or Taskbar
UDF Library » PinIt() - pin to start menu
UDF Library » Pin() - Pins an item to the Start Menu
_________________________
Mart

- Chuck Norris once sold ebay to ebay on ebay.