First off I would like commend you guys in creating this mod, I love the artwork you all have come up with so far  and the video of the demolisher is a thing of beauty, and I can't wait to see more . Crysis looks like the perfect kind of game to put the next battletech game in, i've been drooling over controlling battle armor, VTOLs and aeroplanes with mechs since the mod for BattleField 2

In fact seeing the splendid work is what brought me to asking, for your modeling what programs are you guys using? I'm interested in trying my hand at if you can offer some suggestions of which would be good to use, mainly for starting out if there are any in specific. Thank you all in advance 

You've by no means heard the last of me 

I use autodesk 3dsmax 2008 and zbrush 3.0

If you are just getting started, sign up for a free membership here: http://www.3d-palace.com/
They have all kinds of free tutorials for their members and you can also buy davd or download tutorials.

no problem and good luck with the modelling.