So I have sulcal labels from another software (.mnc format) from which I am trying to generate some probability maps. I was able to convert the .mnc to .mgz surface overlay using mri_vol2surf for my MRIs after running all MRIs in recon-all. So, now I have all my painted voxels as surface overlays, as I was instructed to do a few months ago.

I was told that the next step would be to use mri_surf2surf to resample the overlays to fsaverage. 

I am a bit confused as I would think that the next step would be to take the surface overlays and inflate them before I register them to fsaverage. I see that when recon-all runs, it computes the registration of the MRI surface to fsaverage and saves it as sphere.reg. Is there a way I can inflate my surface overlays in a similar manner and then apply this same registration to my surface overlays? Or am I missing something?

thanks very much!

Trisanna