I've been doing all of my analysis with surface images and now I need to label my results.  I can annotate the visualization in tksurfer but I can't see an automated way to, say, generate a list of all areas with voxels with a value over some threshold.  I thought I might try going to the label files and using mri_label2vol followed by mri_vol2surf.  I'm registering all my surfaces using the icosahedron target and outputting in analyze format so I can import it into R.  I figured the best labels to use would be those from the fsaverage directory.  I converted those into volume files, but in order to convert them into surfaces, I need a .reg file.  I tried the 
sphere.reg files in the surf subdirectory, but mri_vol2surf didn't like that.  Using a .reg file for a volume registered to fsaverage seems redundant, but I see no way around it.  Is there?  Or am I doing this all wrong and there is a much better way to label my surfaces?
<br clear="all"><br>Thanks,<br>-- <br> ,--------------------------------------------------<br>|&nbsp;&nbsp;Alessandro Gagliardi<br>|&nbsp;&nbsp;Rutgers University Mind Brain Analysis<br>|&nbsp;&nbsp;Integrative Neuroscience Program<br>|&nbsp;&nbsp;<a href="mailto:alessandro@gagliardi.name">
alessandro@gagliardi.name</a><br> `--------------------------------------------