Here are the instructions I found for adding a second stream to the arrowchat bar.
1. Go to your arrowchat folder within the plugins folder.
2. Open applications.
3. Create a new folder (ex. streaming_radio2)
4. Copy contents of streaming_radio folder to the new folder.
5. In the new folder, open install_config.php
6. Edit application name (ex. Music2)
7. Edit folder location (ex. streaming_radio2)
I did this by unzipping a new file in an uploads folder that I created, and performed these modifications on the new file then moved it to the applications folder. Then just go to the admin panel to install it. I now have a top hits, and a country stream.
Here they are to make it easy.
Top Hits
http://streaming.radionomy.com/-1HitsCountry
http://streaming.radionomy.com/NashvilleEdge