afni.nimh.nih.gov

Just want to point out that if you smoothed at 8mm, you can't really reduce the smoothing to 4mm. On the other hand, you could potentially go from 4mm to 8mm with 3dBlurtoFWHM, but as Peter recommends, I think redoing the analysis is the proper way to do this. If you have a cluster available to you, this would take less time than the series of posts in the thread....