Hi friends this is a very great trick for the guys who want to login with their multiple accounts in yahoo messenger.....
Multiple Logins in yahoo without Software :-
1) Go to Start
2) Navigate to HKEY_CURRENT_USER-->Software-->Yahoo-->Pager-->Test
3)ON the Right side if the page , Right click and choose new Dword Value.
4) Rename it as " Plural ".
5)Double click and assign a decimal value of 1.
6) Now close registry and restar yahoo messenger and try Multiple Login