Although your problem might be solved ive come up with a solution for future reference D:\Steam\steamapps\common\Skyrim\Vortex the creature pack will show up in a separate folder in this folder nmm in your case basically what you have to do is go into \FNIS Creature Pack 6_1-11811-6-1 and copy all the files in it into the FNIS Behavior 7_4_5-11811-7-4-5 folder this will then create the required scripts ect. into the folder afterwards start FNIS and click update if a notice that Create Creature Behaviors then you have done this right, i hope i was some help to all your issues ;3