True. I thought there'd be some more information somewhere on how the cloaking device might work. I mean from the game AVP2 there is a diary that suggested that the devices attached to the Preds arms would cause it to die if they were removed. In which case this made me think that they are somehow organically connected to the Preds. Especially the way the plasma caster moves about where ever the Pred looks.
Just thought there might be an answer. Interesting. I think.