Import the image into your favorite paint program and print it on a color printer. Another use would be to include it in a project report. Many of the Web postcard sites also use CGI scripts. They are programs usually written in PERL, a very difficult language to learn. However, that doesn't prevent you from using scripts on your own Web page.
Many scripts are free.
With a little help from your system administrator and knowledge of HTML you can have a postcard rack, guestbook, counter, or opinion poll. Matt's Script Archive is one of the best places to go. His directions for setup are excellent. This means you can listen to live radio broadcasts in other parts of the world or large prerecorded files without waiting for them to download. All you need is the RealPlayer plug-in which is free.