This whole "Messenger's various" debate merely mirrors the pickle everyone gets themselves into regularly when discussing related issues, like Messenger pop-up spam. ...Quite why Microsoft inflicted three similar (but not the same) programs on the world, all with similar (but not quite the same) names, is a complete mystery to me (!).
Net Send does use Messenger (as per 'Services' in 'Admin. Tools'). ...There is a Windows Messenger than comes bundled in XP, but which is invariably referred to incorrectly (adding further confusion) as MS Messenger and then we have to have a separate downloadable MSN Messenger performing a similar function as Windows Messenger.
Daft or not?