[Freesurfer] Flattening section of the Cortex

Hello Everyone,

I have the following problem.

I have a section/patch of the Cortical Surface (Auditory area.) which I would like to unfold/flatten.

The data is in matlab and I have it as vertex and faces of the cortical surface.

I know how to write it to a ?h.pial.asc file format from matlab.

I also have activation maps from SPM2.

My questions are :

1. Can I read this surface in freesurfer and an unfold/flatten it ? If yes how ?

2. Can I overlay the activation maps in freesurfer on to the cortial patch I described above? If so could some one list the possible steps please?

3. Finally if I can indeed ufold the above mentioned cortical surface will I be able to export it back to .asc file format?

Thank you

Ajay