Great! Thanks, Daniel. Now I think I have a better understand of the intricacies of these standard brains.
One last question: in looking at the TT_N27 atlases, there isn't anything as macro as just the four lobes of the brain. Do you know of an atlas in TT_N27 space that has just the four lobes? I have found one provided with FSL, so maybe the easiest thing to do is just to convert that to TT_N27 space.
Thanks again,
Chris