Posing the Model
The final step was to give a pose to the model. As it was consisted of several elements, it was a little bit difficult to adjust one by one. So I used the Transpose Master plugin. It is found in the Zplugin menu and you only need to click on the TPoseMesh button to create a low resolution mesh conformed of all subtools included in the original high-res model.
Once I got the final pose of the model I went back to Transpose Master and used the TPose>SubT button to transfer the changes to the original model.
With this low poly mesh, the task of posing the whole model was pretty simple. At this point I used the Transpose Tool to reshape and adjust the model This tool is activated by pressing any of deformation modes (Move, Rotate or Scale). The process consisted of making a selection, shading the part which I did not want to deform and creating one Action Line to deform the model. So I used the Move and Rotate modes to adjust each part of the body.
Well, this was the result after some tweaking. Thanks for reading. Cheers!