Earlier this year, @Heikki has done a skin on the same topic, but I felt like I could maybe do better than his skin, and thus here is my version of MP4-30.
Because of the wired mapping of the model of the manor chassis, I cannot manage to produce a texture with a high res Mclaren logo on the side pod, (technically I could, but that means I'll have to make a 3GB paint file, which I believe no one would be using anyway), Thus I decided to make this livery HD, which is 4096*4096. The result is still not so great, the sidepod camera angle will still show a blurry logo, but some other camera angle is now acceptable.
Because of that, I did 4 versions of the skin, and you can choose which one you want to use.
Install method is in the Readme file.