Dear All, I would like to ask how to change the flirt options in the feat. For example, if I want to change the cost function to "mutualinfo", should I modify my design.fsf file, or the script of $FSLDIR/bin/feat? I searched on the mailing list, but found only one directly related post, https://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind05&L=FSL&P=R149855, It said that the feat command can be modified, but did not say how. Could anyone please give me some hints? That would be appreciated. Best wishes, Ling Wang -- Ling Wang, PhD candidate Cognitive Neurology, Institute of Neurosciences and Medicine (INM-3) Research Centre Juelich 52425 Juelich, Germany Phone: +49-2461-614208 Fax: +49-2461-611518 International Graduate School of Neuroscience Ruhr University Bochum 44801 Bochum, Germany