Excerpted from the SAP HELP, the system posts a corporate action by default with the flow types that have already been determined for the relevant flow categories in Customizing.
http://help.sap.com/erp2005_ehp_04/helpdata/EN/1a/04e989a2dd11d1a52e0000e839d005/content.htm
Can someone tell me how to assign flows to corporate action?