For the preview (3d render), the filepaths are original fifaNo i am about standalone CM 15, as i understood in your modification generic faces using external textures?
If u added new generic head or hair types
U need modify the list, so they appear at creation master (the dropdown lists at generic head selections)
1. Add "new 21to14 generic facepack" by Dmitri (rx3 files)
2. Modify the cm15 lists :
\Creation Master 15\Lists\GenericHead\...