New animation implementation

I have a new animation,i call it "aim" it is sequence no 9 in the soldier.cs file.
I want to be able to "call" it up utilizing the right mouse button.

in a nutshell, right click to aim-left click to fire

this would be a cool feature,and i need help to implement this for the soldier pack.
can anyone help? maybe even point me in the right direction to the files i need
to alter.