[Freesurfer] how generate a head model?

Hi Experts

I have been studying how to generate a head model, and is said to FreeSurfer software allows better tissue segmentation. I've driven German Gomez Herrero tutorial:

http://www.germangh.com/tutorials/dipoles/head_model.htm

I have installed freesurfer and matlab.

I have verified that the initial elements to generate the model head is MRIs, which have them. I have also verified that using FreeSurfer for segmentation and reconstruction MNE to generate the following areas:

0003-inner_skull-5120.tri 0003-inner_skull-dense.tri

0003-outer_skin-5120.tri 0003-outer_skin-dense.tri

0003-outer_skull-5120.tri 0003-outer_skull-dense.tri

My idea is to get the same files to generate my own models and then simulate them power over dipole sources.

From what I have researched the role mri_make_bem_surfaces segmented

surfaces, but I only found this material:

https://surfer.nmr.mgh.harvard.edu/fswiki/mri_make_bem_surfaces

Any help on how to achieve the above-named areas would contribute.

Thank you

Regards