Download version 2.3.1 (IMPORTANT! New Vegas Redesigned 3 will not work with any other version of FCO!) and run the installer.
FCO - Fallout Character Overhaul: This mod contains the textures that are necessary for New Vegas Redesigned 3 to function. Only install this if you want to use FCO for just the new races with no NPC edits, version included in the main file does not work correctly. But what i did i still remembered, i deleted all mods i had for charactrr overhaul, then redownloaded 2.0 again and 3.0 and everything that came with it, i installed 2.0 first then installed 3.0 once 3.0 was installed i unactivated 2.0, i unchecked russel esp.
Honestly i messed around with it till i got it.
