I have found no good way myself yet. In the past, I have deleted all of the previously generated items and ran the “Consume WCF Service” option.
This led me to keep all of my artifacts that were generated by the wizard (schemas, odx, etc) in a sepearate folder in my schemas project. I also avoided doing any customizations of the ODX except for making the odx and the port/multi-part messages it contains public so they could be used in my Orchs project.
-Ben