First load Skyrim and go into Racemenu.
*TIP – Use Alternate Start: Live Another Life and start a new game. This will take you directly to Racemenu
While in Racemenu either load the preset you want to make into a follower or create the followers look now. Once you have the follower’s look finished you would need to make a note of the following:
*TIP – (Instead of a note a screenshot like what I have on this post would be fine)
Body Weight (example a body weight of .5 in Racemenu will be a body weight of 50 in Creation Kit or .2 in Racemenu will be a body weight of 20 in Creation Kit and so on)
Once you have all the information needed then export your facegen. It will be saved in the SKSE/plugin/chargen folders.
TIP: Rename the exported facegen to a name that you’ll easily recognize.