Extras manager is installed by default when you install Skype, and to make sure install extras manager when you install Skype, follow these steps:
In the main screen to install the Skype press the Options button ,see the following picture :
Make sure you select the option : ” Install Skype Extras Manager “,Click I agree-install button to start the installation process.
see the following picture :
Through these options also can be disabled to install the browser toolbar from Skype.
Update – 19 June 2011
Skype Removed Skype Extras Manager from Skype Version No. 5.3, for more information, click here.