I don't really recommend that unless you have a truly complex website with very distinct differences in how the fundamental dispatching is being done or you have a compelling reason to keep several independent struts-config.xml files (which basically means that you're running multiple webapps). You specify the Struts controller servlet in the web.xml file. Also in web.xml you specify the URL mappings. So you can run multiple servlets -- or multiple instances of the standard Struts servlet -- just by adding mappings.
An IDE is no substitute for an Intelligent Developer.