desaturate both images, scale and rotate to match the eye positions.
adjustments-Levels: drop down the midtones and bring up the black to compensate.

(
Paper 'n Pencil Thirst is excellent, even better than I hoped,
Fri 23 Jan 2009, 14:02,
archived)
^what he said
(
god save the queen making another unremarkable comeback,
Fri 23 Jan 2009, 14:06,
archived)
bit. bloody. good.
(
Captain Wow currently being a cunt in Infamous,
Fri 23 Jan 2009, 14:06,
archived)
thanks a lot
for the advice
(
tkitezb seeking images of transvestites shagging cars,
Fri 23 Jan 2009, 14:10,
archived)
splendid
(
SirJonDangerous and his pony-sized bumblebee,
Fri 23 Jan 2009, 14:10,
archived)
This is the sort of thing!
(
Barbarossa is not my real name,
Fri 23 Jan 2009, 14:17,
archived)