Shoutbox

Ok, I found the registry entry, but you're going to have to use regedit to do this manually I'm afraid.

Navigate to:

HKCurrentUser\Software\Microsoft\MSNMessenger\PerPassportSettings

There should be only a single entry... if there's more than one, you'll need to find the correct one... there's a program lying about which will generate the correct value for you, I don't know where it is offhand...

Anyway, click on the correct folder and find the
"ConsolidateOIMs" key. Give it the value 01 00 00 00. (If it doesn't exist it's type REG_BINARY).