If there is a flashable.zip just flash in recovery like a ROM, if it is packaged to be flashed in Odin then use Odin or hiemdal, the xda thread for the note2 should have all info along with download for you
Sent from my Nexus 7 using XDA Premium 4 mobile app
XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. Are you a developer?