Look for NEMESIS 1.2 in the list, click on it and then click Uninstall to initiate the uninstallation. Nemesis checks for the skeleton and add a fake Fnis. Skeletons are common undead hostile mobs equipped with bows. How do I do a fresh install of Fallout 4?.How do I delete all nexus mods at once?.How do you use the nemesis engine in Skyrim?.