i have downloaded some fantastic textures for feral ghouls and some normal maps for terrain, but they dont seem to be working, i check the box that said "load loose files" and instaled the textures in the right places- but it just wont work, i also noticed that if i check the "load loose files button" and then click on data files again the tick has gone

Use http://www.newvegasnexus.com/downloads/file.php?id=35935 To get textures working.