If you have got many Gmail accounts and don’t want to keep logging on and off them every time you switch, a simple command line parameter in the Google Talk shortcut can solve your problem.
Doing this is very simple. Create a new Google Talk shortcut on your desktop, leave the original intact.
- Right click on this shortcut and choose Properties. The Target box will show you the path of the EXE for Google Talk – something like C:\Program Files\Google\Google Talk\googletalk.exe
- Change this to: C:\Program Files\Google\Google Talk\googletalk.exe /nomutex
and click OK.
Now you can login with as many Gmail accounts as you like.
Enjoy! 
Filed under: Google Talk, Hacking, Latest Add-Ons, Multi Login, Technology
Hi Vijan
It didnt work !! i get error saying make sure path and file name are correct
i am on win xp home edition
//Praveen
download google talk multi login