You can create a new resource file in the appropriate resource file list. To create a copy of an existing resource file, select it in the Copy from field of the New... dialog.
Warning!  Since each resource file has a unique id, you should only copy resource files within PowerDesigner, and not in Windows Explorer.
 
- Select  to open the appropriate resource file list.
 
- Click the New tool, enter a name for the new file and select an existing file to copy. Select the <Default template> item to create a minimally completed resource file.
 
- Click OK to create the new resource file, and then specify a filename and click Save  to open it in the Resource Editor.
 Note: You can create an extension file directly in your model from the List of Extensions. For more information, see 
Creating an Extension File.