How to Chat in Yahoo messenger using multiple login accounts by opening Two messengers at the same time

Before you start Backup system registry.

Step1:Close all yahoo applications.

Step2:Open system registry by going to Start->Run->type regedit.

Step3:Go to HKEY_CURRENT_USER \ SOFTWARE \ YAHOO \ PAGER \ TEST
There, in the right-pane, right-click anywhere and select New > DWORD Value. Name the entry as “Plural” (of course, without the quotes). Double-click the newly made entry (Plural), and assign it a value 1.

Now, you can chat using two different yahoo accounts.

Also, findout how this can be done in Gtalkby clicking here

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