Ok, I tried many variations on my own, but I'm stuck: The template batch script provided for spm2b shows how to specify the matrix of filenames for one session; Directory = '/home/karl/SPM/attention/Karen'; Filter = 'sn*.img'; SPM.xY.P = spm_get('files',Directory,Filter); - but what is the proper syntax for specifying different directories for multiple sessions? Jen Whitman