...but this command already exists inside the MOI commands folder!
Ok! Now I understand why I didn't find it in the forum and in http://kyticka.webzdarma.cz/3d/moi it was in the list only.
Hi FiL - yup that command comes as part of the regular MoI install, but you need to set up a keyboard shortcut to trigger it - like you mentioned there is not a button for it in the regular UI.