Provide support staff with documentation and training needed
If the ported product will be sold commercially, you should ensure that your support organization is prepared to handle questions and issues logged by your customers as they install and use the application.
Support specialists will require a combination of education and practical experience before the general release of the application. If possible, at least one support specialist should participate in the same DB2 training as the engineers, and he should be involved in as much of the porting and development work as possible. This yields a natural mechanism for the training and mentoring of other support specialists once the system is ready for testing, and guarantees the presence of a subject matter expert in the support organization.