A simple tweak in your registry, and you can login all your YM accounts at the same time.
1. Go to Start / Run.
2. Type regedit, then hit ENTER.
3. Navigate to HKEY_CURRENT_ USER / Software / Yahoo / Pager / Test
4. On the right page, right-click and choose new Dword value.
5. Rename it as Plural.
6. Double click and assign a decimal value of 1. (even 2, 3 etc..)
That’s it! You’re done. That’s how easy it is.
You can now open your Yahoo Messenger and login with your main ID. Then click the Yahoo messenger icon again to create a new instance or you can go to Start>Program>Yahoo Messenger then click Yahoo Messenger. You will notice that it will open another YM window allowing you to login with a different login id. So no more logging out and logging in to check other accounts. Enjoy chatting…