title: Blackberry supporting multiple screens
body: <p>I have developed my BlackBerry app for screen resolution 320x240. Now I need it to support screens of multiple resolutions.
  Where do I store images for different resolutions and access them accordingly through code, without making separate build for every screen resolution?</p>
  
  <p>If possible please provide me the various screen sizes available for BlackBerry, that need to be ported.</p>