well the lastest Windows Live Messenger allows Messenger Plus! to hook onto it, however it is buggy and only one feature seems to work for me, that being boss protection. You will need Messenger Plus! 3.61 for this to work and not the latest 3.62.
Note: the latest version of Windows Live Messenger is only given out to selected testers (not people who have been invited) and should look more like this.
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