Why are you using a creature template? Wouldn't it be human, well at least the human ones?
I'll work on something, I have to break out my RCR.
In the meantime, here is my version for the Alien (from the movies.)
Large Predator 4; Init +3 (Dex); Defense 20 (+8 natural, +3 Dex, -1 size) DR 5; Spd 12 m, Climb Spd 8 m; VP/WP 36/19; Atk +8 melee (Bite (special)/claw/tail/gore 1d6+4/1d4+4/11d8+4); Climate any.
SQ Blindsight, camouflage (+8 hide in natural environment), terrifying presence, acid blood (see below), improved grab, Energy resistance: acid immune, cold 10, fire/blasters 5, electricity/ion 15, sonic 5.
SV Fort +10, Ref +8, Will +5; Sz L
Str 18, Dex 16, Con 19, Int 4, Wis 16, Cha 12.
Skills: Climb +6, Hide +8 (+16), Intimidate +3, Jump +6, Move Silently +8, Spot +5.
Feats: Track, Power Attack, Run.
Acid blood: whenever an Alien takes wound damage there is a chance for its acid blood to spray. Any characters adjacent to the Alien must make a reflex save DC 15 or be sprayed with acid. The acid is concentrated causing 3d6 initial damage and 3d6 damage for 1d4+2 rounds thereafter. If sprayed on a characters armor the armor is rendered useless and after 2 rounds, the character (if still in the armor) begins to take the damage for the remaining rounds.
Bite special attack: When an Alien scores a hit with its bite attack it can immediately make a second attack with the smaller inside mouth. This smaller mouth causes gore damage of 1d8.
Terrifying Presence: Intimidate check DC 15 + opponent’s level. On a successful save the opponent must make a Will save DC 15. On a failed roll the opponent may only take a move action or an attack action on his next turn. If the Will save fails by 10 or more the opponent is cowering. (see pages 331 and chapter 12).
Improved Grab: see page 331.