A zombie effect can be achieved easily when you combine the pin tool with the link tool. The setup is just like the "pushing wheelchair" topic covered in an earlier post, the plan is to create a sphere for each wrist. place the sphere on the wrist and the pin the wrist to the sphere. 
Now if you link/attach the sphere's to the character then the arm animation will be overwritten (made void). If you place the spheres away from the body then the arms can be set to extebd forward just like a zombie. My favorite zombie films are....I am Legend, 28 days and Shaun of the Dead. Have fun!!
Oh, btw, I got the texture maps from the web, and the character is a cowboy (you may want to experiment with different walk cycles for the character and slower durations in the timeline).
