Not a bad idea :Terry
Little tweaks here and there though-
The eyes change the white aria of the eyes to more of a navy blue @-)
The stance. He would likely stand there 'looking down on you' the in a fighting pose, as though he doesn't really see you ad a threat. In truth, without weaponry, he's be right :P
(http://2.bp.blogspot.com/-O4XFQvzPeZg/T-KmL0YalkI/AAAAAAAAAE4/q8ykhSJQLdY/s1600/Prometheus_Pressure_Suit_1a.jpg)
The body needs just a little more detail here and there, you really don't need to use Alien bits at all.
(http://1.bp.blogspot.com/-s_qDtUBC4yQ/UKRXVGZQabI/AAAAAAAABJU/A7_iEK8HWo8/s1600/prometheus_movie_engineer_deletedscenes.jpg)
PM me later, I'll show you a trick ;)
This reeeeeeeeally should be in a new BoR game.