To remove the Outlook Express icon, used Regedt32 to navigate to:
HKEY_LOCAL_MACHINE\Software\Microsoft\Active Setup\Installed Components\\{44BBA840-CC51-11CF-AAFA-00AA00B6015C\}
Select the Stubpath value name in the right hand pane and delete it.
To prevent the ICW icon from being installed, use Regedt32 and select the HKEY_USERS hive. On the Registry menu, Load Hive. Browse to the NTUSER.DAT file of the default user. The local Default User NTUSER.DAT files is located at:
%SystemDrive%\Documents and Settings\Default User\Ntuser.dat.
Name the Key JSINEW. Navigate to:
HKEY_USERS\JSINEW\Software\Microsoft\Windows\CurrentVersion\Runonce
Delete the ^SetupICWDesktop value name. Select the JSINEW key and Unload Hive.