I created a modified version of aparc+aseg.mgz files. Values now represent the functional connectivity strength of each parcel in the Desikan-Killiany atlas (ranging from -0.2 to 1 - rvalues).

I would like to represent these new parcellation r-values over the native inflated surface (with freeview maybe?). How can I convert this volume (modified aparc+aseg - in orig.mgz space) to label/annotation to be represented on the surface?

Thanks!