Dear Gergely

first off: thank you very much for the fast help! So very quick.

With your hints I managed to actually produce a working *.cutlas file with the inia19 dataset.
The last thing I'd like to do (if possible) is to remove the DTI data from the file as we don't need it for registration and most monkey datasets don't even come with DTI data.
However, if I don't include it in the cutlas, QuickNII throws an 'Array out of bounds' error so I'm guessing it will always expect the *.cutlas file to have 7 volumes total in the original order (i.e. 2 volumes MRI, 3 volumes DTI, 2 volumes Segmentation)?

Cheers
Janine