Einar,

If I understand you correctly you are talking about Taskbar Grouping. To have the "common" application name show in the Taskbar you need to set the following attribute in your AssemblyInfo.cs source file.

[assembly: AssemblyTitle("Zaphod")]

Once rebuilt when grouping occurs you will now see the common title. If you do not see this then try rebooting your PC as this information is sometimes cached by the OS.

If you want to change the icon then select your project and get the general page of the properties up. There you will find the application icon option that is used for this purpose.

Regards
Neil