Please explain how to open 2 crome profiles at the same time. (for example to have 2 gmail accounts open in 2 different windows)

http://dev.chromium.org/developers/c...using-profiles
Remember that the chrome-dev-profile directory can be anything you want.
If you start chrome with the original shortcut it will be the Default profile and when you start it from the shortcut you created with that tut youll have another chrome window running that profile. Make as many profiles as you want.
If you want the new profile to start with the data from the original profile the simplest method would prolly be to use this.....
http://www.favbrowser.com/backup/
...backup from one profile and restore to the other

Thanks for the info