Save Face Ripper
Pick your input save file containing the face you wish to transfer. Pick your output save file which the face will be injected into. Click Overwrite Face and the new merged save will be created.
I tested this on a bunch of my saves, but its quite likely it won’t work on all. Theoretically supports race and gender changes. Targets the player by default but can also target NPCs present in the save file (not sure if this is useful yet).
If skin tone and makeup don’t appear correctly, try entering the looks menu (console: slm 14) and just enter the skin tone menu and flip through the options without finalizing a change. This usually caused the whole face to update to the new tone and makeup for me.
Can also dump face data translated for use in FO4Edit for making presets or whatever (requires expert knowledge).