How To Make 2 Email address In One yahoo Id ??

1) Enter www.mail.yahoo.com
2) Sign In With Your ID&Password
3)Press Options
4)Mail Addresses
5)Get Started( will Find It at the left Corner)
6)Create a new Yahoo! Mail address ~~> Type Any Id You Need
7)and Press Check Availability
8)Type Code and Ok

!! Done !!

Multiple login in yahoo Without Using any Software

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 ----->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!!
Now close registry and restart yahoo messenger and try Multiple Login.