This file defines the NPC portrait in case if the given NPC's portrait is used by PC.
First column is filled by names of NPCs original portraits.
The second column is filled by replacement portraits used when PC is using portrait from first column.
In BG1 TotS we have:

 2DA V1.0
 MAN2S
           REPLACEMENT
AJANTISL   MAN2L
AJANTISS   MAN2S
ALORAL     WOMAN1L
ALORAS     WOMAN1S
BRANWEL    WOMAN2L
BRANWES    WOMAN2S
CORANL     GENMELFL
CORANS     GENMELFS
DYNAHEIL   WOMAN2L
DYNAHEIS   WOMAN2S
EDWINL     GENMHLFL
EDWINS     GENMHLFS
ELDOTHL    GENMHLFL
ELDOTHS    GENMHLFS
FALDORNL   WOMAN2L
FALDORNS   WOMAN2S
GARRICKL   MAN2L
GARRICKS   MAN2S
IMOENL     WOMAN2L
IMOENS     WOMAN2S
JAHEIRAL   WOMAN2L
JAHEIRAS   WOMAN2S
KAGAINL    GENDWRFL
KAGAINS    GENDWRFS
KHALIDL    MAN2L
KHALIDS    MAN2S
KIVANL     GENMELFL
KIVANS     GENMELFS
MINSCL     MAN1L
MINSCS     MAN1S
MONTARL    MAN2L
MONTARS    MAN2S
QUAYLEL    GENMHLFL
QUAYLES    GENMHLFS
SAFANAL    WOMAN2L
SAFANAS    WOMAN2S
SHARTELL   WOMAN2L
SHARTELS   WOMAN2S
SKIEL      WOMAN2L
SKIES      WOMAN2S
TIAXL      WOMAN2L
TIAXS      WOMAN2S
VICONIAL   WOMAN1L
VICONIAS   WOMAN1S
XANL       GENMHLFL
XANS       GENMHLFS
XZARL      GENMHLFL
XZARS      GENMHLFS
YESLICKL   GENDWRFL
YESLICKS   GENDWRFS
MAN1L      MINSCL
MAN1S      MINSCS
MAN2L      AJANTISL
MAN2S      AJANTISS
WOMAN1L    ALORAL
WOMAN1S    ALORAS
WOMAN2L    BRANWEL
WOMAN2S    BRANWES
GENMELFL   CORANL
GENMELFS   CORANS
GENMHLFL   EDWINL
GENMHLFS   EDWINS
GENDWRFL   KAGAINL
GENDWRFS   KAGAINS