If you follow the instructions in my previous post, you should have the MNI atlases installed. Check with this command. You should have these atlases at the end of the output.
whereami -show_atlases
...
++ CA_ML_18_MNI: Eickhoff-Zilles macro labels from N27
++ CA_MPM_18_MNI: Eickhoff-Zilles maximum probability map on MNI-152 from post-mortem analysis
++ CA_PM_18_MNI: Eickhoff-Zilles probablity maps on MNI-152 from post-mortem analysis
++ CA_GW_18_MNI: Eickhoff-Zilles probablity maps on MNI-152 from post-mortem analysis
++ CA_LR_18_MNI: Simple left, right hemisphere segmentation
++ --------------------------