If you are wondering how to run multiple Yahoo! Messenger accounts within the same PC, here’s how it can be done by just applying a simple registry hack.
- Go to Start > Run.
- In the Run box, type regedit and click OK button to launch the Registry Editor.
- Now, navigate to HKEY_CURRENT_USER > Software > Yahoo > Pager > Test.
- On the right pane, right click , choose New > DWORD value.