Here is the instructions for installing FNIS manually for Skyrim, for those of you who are wanting to install FNIS for SexLab please look here.   This guide requires that you have some common knowledge of modding Skyrim. This guide assumes you are using an account with administrator privileges.        1. Download SKSE from here 2. Go to the FNIS download page on the Nexus.  3. Download the file called FNIS Behavior v5_3 -- ALWAYS necessary 4. Download the file called FNIS Idle Spells v