Registry hack to open multiple Yahoo messengers on a single PC.

Here are the steps :

• Click on Start -> Run…
• Type Regedit in Run text box and hit enter to launch Registry Editor
• Now, navigate to HKEY_CURRENT_USER > Software > Yahoo > Pager > Test.
• On the right pane, right click and click on New > DWORD value
• Rename the new registry key as Plural.
• Right Click on “Plural” and Select “Modify”. Change the cell value in “Value Data” to 1