Step 1) Create an area on your scene and select "Web Pages"
Step 2) In the field "Web filename", you can paste in the radio URL link you wish to have e.g. Sample Radio 1 Live URL http://www.bbc.co.uk/radio/player/bbc_radio_one
Step 3) Press OK and click the floppy disk icon (located under Scene Editor)
Please note that if you have multiple scenes then you will have to add the Web Page area with the URL to all.