To install, unzip and place the folder in 'DCS world OpenBeta' (or Alpha) CoreMods, aircraft, MiG-15bis, Liveries, MiG-15bis. Select 'USA' in the mission editor. Then the 'JACKDAWS - REDBULL' skin will appear in the drop down box.
I still haven't quite figured out how to do specular reflections yet. This is quite basic compare to most skins out there, however i did try my best. It was by far the most difficult for me yet, but fun. Please comment if you like. Thanks!