I found this @ ieXbeta and this is what they said:
Microsoft have just updated their Windows Messenger client to version 4.7, FINAL. The new 4.7.0101 is available ONLY for Windows XP. MSN for other Windows versions is still 4.6.0.82, although perhaps the XP version can be ripped to work on 2K, but we will see... Click on Read More... for a download link

Click here for download MSN 4.7 Final English Go here for download links of other languages