My normal means of installing packages in Sublime is to Ctrl/Cmd + Shift + p to open the Command Palette, type Install, select the option for installing from ...
One of the first things you want to do with Sublime is to find your User key bindings. They're located under Sublime Text 2 > Preferences > Key Bindings - User.
You can open Packages list by pressing Cmd-Shift-P (on Windows should be Ctrl-Shift-P ), choosing Package Control: list packages then select the package you ...