Most people have more than one yahoo id and would like to use both at the same time at yahoo messenger for chatting. But, by default when you first install Yahoo messenger 8, 9 or 10 you can only login using one yahoo id at a time. If you have multiple yahoo accounts and would like to login to that one, you are left with no other option than to signout the current account and than login to other id. I am going to show you a small trick that will enable you to login into yahoo with multiple ids at the same time. It does not require any Software or any kind of third party application. All you need to do is make some changes in the windows registry.
You can login with multiple id's on the same yahoo messenger without any download or patch .
Follow these steps:
1. Go to Start -> Run . Type regedit, then enter .
2. Navigate to HKEY_CURRENT_USER ---> Software -> yahoo ->page-->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!!
Now close registry and restart yahoo messenger and try Multiple Login
