To enable multiple logins in you Yahoo! Messenger, Follow these steps :
- Click Start Menu And Click On “RUN”
- Type “regedit” and click OK
- You will see the REGISTRY EDITOR
- Navigate to “ HKEY_CURRENT_USER/Software/Yahoo/Pager/Test “
- Here in right side panel, right click to create a new Dword value with name Plural and give it value 1.
- Close the registry editor and enjoy multiple yahoo logins.