This is very simple. All you have to do is:

Go to START > RUN, type ‘regedit’ and press ENTER. In the regedit window, navigate to ‘HKEY_CURRENT_USER\Software\Yahoo\Pager\Test’

Now in the right pane, right click New > DWORD Value. Name it as ‘Plural’. Now Double click the Plural DWORD you created and set its value to 1.

That’s it! Now you can open more than one Yahoo Messenger.

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