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 pane , right-click and choose new Dword value .
4.Rename it as Plural.
5.Double click and assign a decimal value of 1.
That's it done!!
Multiple google talk login
1. Right-click on the desktop
2. Select New
3. Select Shortcut
4. Paste this into the text box:
"c:\program files\google\google talk\googletalk.exe" /nomutex
(dont miss even a comma)
5. Click Next
6. Name it whatever: Google Talk Multiple, etc.
7. Click OK until you are done.
