Once you have created a program structure file for your source program, you can chose which elements of your program to leave as they are, and which to place into AcuBench's graphical interfaces. A first step might be to copy your Working-Storage code into the graphical Working Storage Designer. After performing this step, AcuBench stores your Working-Storage data in the program structure file, and you can view and modify Working-Storage items through the graphical design interface.
You may also want to add your existing screens to AcuBench so that you can maintain and update them using the graphical Screen Designer. The steps involved in this process can be found in Updating a Character-based Screen and Importing a Graphical Screen.