Frederic,
what I did in the past is as follows ... it is not elegant, mind you:
a) load the 2mm template
b) using the Atlas tool, overlay the ROI you are interested in, e.g. left insula
c) in the 'Overlay Settings', make sure that the ROI is selected (and not the template!)
d) File, Save As..., save it as Left_Insula_2mm.nii.gz
e) Repeat for other ROIs
If you want them in 1mm, load the 1mm template at point (a)
Hope this helps.
Kind regards,
Luca
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