Xenos/temperature and "Please...kill me..." woman

I've been sucked into the micro-analysis of the "Alien" franchise, I have enjoyed numerous discussions on the boards - thanks to everyone! Here are my questions: First, let me start of with the "Please...kill me..." woman that Dietrich finds alive in "Aliens". How could this woman still be alive considering the short incubation span from face hugger to chest burster? Here, I am assuming a similar time span from infection (face hugger) to manifestation (chest burster) to that of Kane (I'm guessing ~ 12 hours?). My guess...she was hiding out like Newt and recently captured. The Colonial Marines find her on the periphery of the red dot map that Hudson pulled up in Operations ("personal tracking devices" - ?) Like any harvester, the Xenos could be operating like from the inside-out, putting newer captures on the periphery. Thoughts anyone. Now, my second question has to do with Xenos and the effects of temperature. The Marines find the woman and several deceased colonists under the reactor's primary heat exchangers (why the secondary or tertiary heat exchangers couldn't alleviate the damage from the dropship's crash, I don't know). As previously stated, Hudson finds the PDTs concentrated under the primary heat exchangers (sub-level 3). Questions/Comments 1. Why did the Xenos harvest the colonists under the heat exchangers? Could it be that the Xenos know that the human body core temperature is 37oC (98.6oF) and for optimal chest burster conditions, under the heat exchangers would be ideal? Perhaps it's that the Xenos prefer warmer conditions themselves - they strike me as cold-blooded creatures (no pun intended) albeit with a pH of 1. In "Alien" as Kane is lowered into the cave, he says "…it's like the g-damn tropics in here…" - this could be referring to the mist he sees assigning it to dense humidity. Frost collaborates the temperature under the heat exchangers with his comment "…it's as hot as Hell in here…" 2. Ash suggests that the crew use "fire" to drive the Xeno through the ventilation shafts to the airlock. In "Aliens" the Marines turn to flame throwers after their pulse rifles' magazines are confiscated - does anyone else find it odd that the Marines didn't carry spare magazines? I must interject with my favorite line from the series, Frost: "…what are we supposed to use man, harsh language?" I don't recall seeing any Aliens being flamed by the Marines. Perhaps they feel the temperature but the "polarized silicon" shell (thanks to Ash's analyses) prevents the Xenos from igniting? Ash may have already known this and hence his suggestion to use fire. Why the Nostromo crew didn't use their weapons on the Xeno is odd, we don't even see what the weapons are - recall that when Dallas decides to investigate the source of the transmission with Kane and Lambert, he says "…we better break out the weapons…" Now, Ripley flames the eggs and the Queen screams in a hissy fit - maybe more from her altruistic attachment to the eggs than the effects of heat…but who knows? Consider that the Xeno in "Alien" could survive in outer space, at least long enough for an attempt to break-in through the engines. The Queen in "Aliens" provides some screams in outer space (apparently in space someone can hear you scream) after being ejected through the airlock. 3. For reference we have: Temperature of Outer Space: -270oC (-454oF) (cf. "Alien") Temperature of Napalm Burn (flamethrower): 800-1200oC (1472-2192oF) (cf. "Aliens" Temperature of Molten Lead: 328oC (622oF) (cf. "Alien3) Temperature of Liquid Nitrogen: -196oC (-321oF) (cf. "Aliens: Resurrection" and AVP (non-canon) where the Queen is stored in a frozen state, possibly liquid nitrogen, liquid helium, something else) My first impulse was that the Xenos can tolerate moderate changes in temperature, but after looking at the temperature ranges...they seem rather resilient..."perfect organism" - Ash. I look forward to reading your comments.