Yes, it works, the only thing you had to do is install a patch that changes the protocol of MSNP13 to MSNP12. The executable of the WLM installer doesn’t work but you can extract the archives with WinRAR and execute the archive “MsnMsgs.msi”
Patch: msnm8patch
WLM 8.0 Beta: https://archive.org/download/MsnMessengerClients2/Windows%20Live%20Messenger%208.0.0365.0%20(English%20-%20United%20States).zip