There is a tutorial here for making a new race: http://www.creationkit.com/Tutorial_Creating_a_Playable_Race There is an easy step to miss (I was following this tutorial and still skipped it!). In the General Data section, under Copied Data, you need to set Morph Race to an existing race, the one you copied from most likely. Do this also for the Armor Race, unless you want to be naked all the time (I don't know if you'll encounter other errors).