Disadvantages
After you create a custom PIP, you must manually keep the custom process in parallel with the standard process from that point on (for example, when new features are added to the process).
Customizing and exporting a PIP does not save any services or process models associated with that PIP. Exporting a PIP saves only the IS document types, TPAs and TN XML document types associated with the PIP (and only those IS document types and TN XML document types that are contained in the
wm.b2b.rn.rec.PIPs folder).
To save the services, you must create your own package on Integration Server and place all of your services within that package. You can then manage that package, as required by your installation, including sending that package to your trading partners. To save the process model for the customized PIP, you must use Designer.