How can I change the creature ID by adding it as an NCF file?

in your zombie mod, all paths are unique and do not affect files from the original game, so you can immediately place them in the NCF



you also need to figure out the camera (it's not in your mod) and the script file (it's also not there). Download the zombie mod by psatkha and extract the scripts and Cameras folders from there. You will need to replace the numbers, and in the script file, write the name.