ENB Enhance Shaders Mod textures are gray/help need tutorial

[iceninja999]

So I download the mod and I read the read me file it says I need ENB sires I think it was the injetor but any was I download that Install ENB shader in to the root of fallout nv and then I install the injetor I run the injetor and it loads the game and say ENB shader... Ect then I say something like WARNING THIS HARDWARER IS NOT ANITI something I'm not at my computer now so I don't no what exsacly it was then the game loads I load my save and I press SHIFT-F12 terns it on but the hole sceren it gray I can here my player moveig and stuff but I can't see the game I try s#*!-ENTER nothing. Can someone plz help me that wood be helpful thanks