Hi Nameeta,
The templates are there for those who wish to perform automatic warping to Talairach space.
The transform is not identical to the one carried out by hand and would vary somewhat with different templates.
The template we are distributing are originally from MNI: [
www.bic.mni.mcgill.ca] and SPM: [
www.fil.ion.ucl.ac.uk]. NOTE however that the templates were modified to correspond with the Talairach coordinate system (Talairach and Tournoux 1988) instead of the MNI space. This was done to keep the Talairach coordinate system consistent in AFNI.
Where am I option should work well if you are using the templates we are distributing.
cheers,
-ziad