This is off this page:
http://www.msgpluslive.net/download/
quote:
compatibility
The only thing needed to use Messenger Plus! Live is Windows Live Messenger (the latest version of MSN Messenger) which requires Windows XP or above. Messenger Plus! Live is compatible with Windows Live Messenger 8.0 to 9.0 and can be installed on 32bit and 64bit versions of Windows XP and Windows Vista.
And like i said, if it was really a "closed beta" then ONLY the people who where asked to do the beta, should of been able to use it. not anyone who gets their hands on it.
And yes - i still get that error.