Is there a Pack & Go command "button" for customizing

I'd like to add a button for the Pack & Go command to my main shortcut menu at the top of the screen.  I can't seem to find it anywhere in the Customize tabs or command.  I know I could do a keyboard shortcut, but I'd like the button.  Any info would be appreciated.

Thanks,

John

SW2012 x64 SP5.0

Win7

SolidworksUser Interface