Need help animating a crossbow

I have started making a crossbow for use in a game. It is reverse draw, meaning the bendy arms are the opposite way around to normal. I think I have done everything right so far. I have made the mesh, and an armature bone thing. However, even after reading tutorials, I still can’t figure out:
A) How to bind the bones to the mesh (already parented the mesh to the main bone)
B) How to get the 10 segment bendy bone to make the arms flex

Could someone have a look at it and see if they can tell me how I would go about doing it? Thanks, and all help appreciated.

Download the file at: https://www.dropbox.com/s/pe3mafyymaw9poy/crossbow.zip

Looking at it the way it is now, I think you’re going to need some edge loops on the arms of the bow to get any bend in the model. Low poly is one thing, but it’s currently too sparse in terms of vertices to get any nice flexing. First step is to put some equally spaced loops along the parts that are supposed to bend so there are some actual vertices to work with for the deformation.

Ah… How do I do Edge Loops? I am still quite a noob to Blender. And how would I make sure they are evenly spaced etc?

http://wiki.blender.org/index.php/Doc:2.6/Manual/Modeling/Meshes/Editing/Subdividing/Loop_Subdivide

Ah, thanks. Will get to work making those loops then when I have the time. How would I ‘mirror’ them onto the other crossbow arm?