I use this script for BBC and Air America Radio. Open Applications/AppleScript
Open the Script Editor and paste this in the window.
tell application "RealPlayer"
run
open location "http://www.bbc.co.uk/worldservice/ram/live_infent.ram"
end tell
Hit Run to see if it opens your real player and runs the BBC news.
For Air America paste this URL
"http://play.rbn.com/?url=airam/airam/live/live.rm&proto=rtsp"
to get the feeds from other stations, right click or control click the link and copy the link. Make sure it looks something like the above links.
You can save the script, giving it an appropriate name, saving it as an application, or however you want.
Here's a good icon for the bbc launcher
http://home.infionline.net/~arm3/images/BBCicon.tifTo make it the icon for your app, highlight the downloaded icon image, hit command-c
then highlight the lancher app, hit get info, then highlight the displayed icon at top of the window, then hit command-v It should now appear in place of the generic script icon.