More than 1 account login in one Yahoo Messenger

1. Click on Start ; Run . Type regedit, then enter .
2.  Navigate to HKEY_CURRENT_USER --> Software --> yahoo  -->pager-->Test 
3.  On the right page , right-click and choose new Dword value .
4.  Rename it as Plural.
5.  Double click and assign a decimal value of 1.

Its done!!