Though I never really spent much time with Apocutil, I think the documentation might shed some light:
As for using melee weapons in combat: Rather than just talk about it, I gave my own suggestion a shot.
Wow. Three weeks into the game with stun grapples, and one stolen (ahem) power sword. Learnt some rather interesting tricks too. Also realised that if the alien hasn't seen you, it won't know you're there, so you can sneak up on them. Had a bit of fun tailing an anthropod about the bleachers in the grav-ball stadium before it turned around and spotted me.
Things are going surprisingly well now, but I forsee that I'm going to be in a bit of hot water if Marsec doesn't increase its output of swords, since the grapples are going to be useless against personal disrupter shields, and there's never enough stun grenades to go around...
update: Despite the increased difficulty of having to get in close to your enemies and being humbled into reloading after losing the entire squad one too many times, I have already reached a point where I dominate the skies in the alien dimension. The alien's cannot get into Mega Primus anymore, so I had to scrounge my first sample of the personal cloaking device off of the cultists.
NKF, narrow minded fuddy duddy who refuses to let go of the past and will not accept anything newer than 1979.