You can add this reg key to the msi (altered when selecting via tools window) [HKEY_CURRENT_USER\Software\Microsoft\MSNMessenger] "AppSettings"=hex:42,02,01,00 and the autorun reg key [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run] "msnmsgr"="\"C:\\Program Files\\Windows Live\\Messenger\\msnmsgr.exe\" /background" I am new to MSI packaging and wondered exactly how you would implement this change using installshield adminstudio. Can anyone assist? TIA Spadge