By researching the topic in question and finding out, how it works. Like in note 1539457. After the research is done, one can experiment/test.
EDIT: as for CREATE - if you disable this, you'll face serious problems in case you Exchange IDOC's that create/change equipments, because the realtionship between sender/receiver IDOC's is documented in GOS. As are several other things. I'd be ever so careful to disable this.