Yes, you would need to save your MMF application as a Java Web Applet. Then you simply select the .jar file in Xwrap and it does the rest!
To have your own icon
You would need to get yourself an icon from somewhere (or make your own!). Simply select the icns file in Xwrap and it will add it to your app!
To have your own help system
Also, if you would like to have your own help-system, you need to create some HTML pages to use. Nothing much to it! Simply select the folder in Xwrap!
The Rest
Everything else such as the name of the app, the size of the application, etc. is setup in Xwrap. You can even toggle FULL SCREEN mode which will allow the user to use your apps in full-screen.