C# & XP Taskbar grouping

Hopefully someone here will be able to point me in the right direction.

In my C# application I have several forms which get a taskbar button when open. These buttons appear correctly with proper form name and application icon. however when the taskbar automatically groups the buttons together, the group button has no name, and the icon changes to the basic .exe icon.

Is there a way to explicitly set the application group name and icon.

Regards.