Some of us have multiple gmail login Ids for whatever reasons, but we can not open all the ids at a time using gtalk client on a single computer. If you singin to gmail with one ID you have to logout before you could login to other gmail ID. One solution for this is to use gtalk, gmail in IE and gmail in Firefox simultaneously, this way you can signin to different Gmail accounts. The other solution is to use meebo.
But there is a small tweak with which you could login to several Gmail ids using google talk client. The tweak is a command line code, this will allow you to open multiple instances of gtalk on a single computer. So far i have logged in with 4 different Gmail Ids at a time and they are working perfectly.
Image showing 3 gtalk instances logged in at a time
How to open multiple gtalk
Click start button and hit run, type command in the run window, now go to the directory where google talk is installed, here enter googletalk/nomutex, now you will see gtalk will open, enter the same command to open multiple instances of gtalk. That’s it now you have multiple gtalk instances running simultaneously with different IDs logged in.
C:\Program Files\Google\Google Talk>googletalk/nomutex