jstout's post in TSBm 1.3: Making your own FACES was marked as the answer
Here is an example of how the faces are done:
Frank Reich:
x1C054 $A064 (POINTER) = B9A3
x1C3C9 $A3B9 (DESIGN) = CC10 CF60 CDCC CEBD CF97 B074
x1CC20 $AC10 (HAIR) = 700088 704090 710888 710890 7A0080 7A4098 FE
x1CDDC $ADCC (EARS) = 7A0080 7A4098 380800 384818 3A1000 3A5018 FE
x1CECD $AEBD (MOUTH) = 221408 225410 FE
x1CF70 $AF60 (EYES) = 1B0988 1B4990 FE
x1CFA7 $AF97 (LOWER HEAD) = 021008 025010 071808 075810 FE
x1D084 $B074 (UPPER HEAD) = 210008 214010 000808 004810 FF
Format: TILE ROW COLUMN
*ROW = +00 = NORMAL, +40 = HORIZONTAL MIRROR, +80 = VERTICAL MIRROR, +C0 = HORIZONTAL AND VERTICAL MIRROR
*COLUMN = +00 = PALETTE 0, +40 = PALETTE 01, +80 = PALETTE 02, +C0 = PALETTE 03
FE = NEXT
FF = END
