whit89

Can somebody please run me through step by step exactly how i can add this to the tech tree?

I think it does ive seen two youtubers using the reentry mod in the tech tree , the parts are there in sand box , im using this one http://forum.kerbalspaceprogram.com/threads/32342-0-20-Deadly-Reentry-2-3-reentry-heat-plus-thermal-and-g-force-damage-to-parts

I have just downloaded deadly re entry and have extracted it to my folder but the part are not appearing on my tech tree how do i fix that?