Many of you will have several WLIDs, and want to sign into Messenger with more than one of them. Until now you had to seek refuge in a patch or add-on to be able to do so. Not anymore! Microsoft’s John Weisenfeld just shared a little trick with me to enable this, which I’m going to share with you.
The trick involves registry editing, so please follow these steps very carefully:
1. Start regedit (admin)
2. Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Live
3. Right click Messenger and create a new DWORD called MultipleInstances And set it to 1
Full Article – http://liveside.net/main/archive/2008/12/17/how-to-enable-polygamy-in-windows-live-messenger.aspx
