(No matter how msn can be installed, you can only use the page version of msn, the green version of MSN can be used without installation, and share it with everyone.
MSNMessenger\abssm.dll
MSNMessenger\contact.dll
MSNMessenger\contactsUX.dll
MSNMessenger\custsat.dll
MSNMessenger\dfsr.dll
MSNMessenger\fsshext.8.5.1302.1018.dll
MSNMessenger\lcapi.dll
MSNMessenger\lcres.dll
MSNMessenger\lmcdata.dll
MSNMessenger\MessengerClient.dll
MSNMessenger\msgrapp.8.5.1302.1018.dll
MSNMessenger\msgsc.8.5.1302.1018.dll
MSNMessenger\msgslang.8.5.1302.1018.dll
MSNMessenger\msgsres.dll
MSNMessenger\msgswcam.dll
MSNMessenger\msidcrl40.dll
MSNMessenger\msncore.dll
MSNMessenger\msnmsgr.exe
MSNMessenger\msvcr80.dll
MSNMessenger\msvsui.dll
MSNMessenger\pcsexeps.dll
MSNMessenger\psmsong.8.5.1302.1018.dll
MSNMessenger\RTMPLTFM.dll
MSNMessenger\sirenacm.dll
MSNMessenger\usnsvcps.dll
MSNMessenger\wmp8stub.dll
MSNMessenger\wmv9vcm.dll
.....)