popabf, you would have to write your own program for design calculations. But since version 8, SAP's input and output databases are fully open, which should make that task a little easier.
One other suggestion.. the guys at CSI have added several special request features into SAP for us over the years, so why not formally request them to implement your design code and section libraries into SAP? If you offer to help them with questions that come up during the implementation, I wouldn't be surprised if they added it for you. Probably best to make such a request through the normal support@csiberkeley.com support email address