Many thanks!
I've been playing with doing just that, having imported an openlipped head now.
Question; In the screen where you place the dots, the imported head is completely black, just a silouette, which makes it really hard to place the dots for the hose and lips.  Trial and error and guesswork  only seems to work about 1/4 the time.  How do I correct this?  It would be a lot simpler if the imported mesh in the line screen could be rotated at will to place it.
Also I can' figure how to move either a dot or a line once placed, other than clearing all and starting over. I just get a musical error tone when I try.