Replace these files in
C:\Program Files\Rockstar Games\GTA San Andreas\models\player.img


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gimpmask.dff      .....leon face
gimptorso.dff     .....leon jacket
gimphands.dff     .....leon hand
gimpleg.dff       .....leon leg
gimpfeet.dff      .....leon shoes
cs_gimpmask.dff   .....cut scene leon face


Greetings XDMODERXD