Hi, This is a followup to the ppi question I asked earlier (I receive in digest, so I forgive if this crosses a reply). I tried running with the way I suggested, as well as putting everything in one session. The results are similar, but the activation is more significant in the one-run approach. Any comments? Allison Nugent MRI Physicist SNMAD/MIB/NIMH/NIH Office: (301)451-8863 Mobile: (301)408-8560 [log in to unmask]