Adapted from another post:

To set an MP3 to stream, upload your mp3 to your webspace,

so, for example, the url location is: http://www.yourwebsite.com/audio1.mp3

Open notepad, on your desktop (right click - new - text document). and on the first line, type in the url of the mp3 (eg// http://www.yourwebsite.com/audio1.mp3)

Save the file as eg 'audio1.m3u' (press 'save as' then type 'audio1.m3u' as the file name and make sure the drop down menu (files of type) says *.*... Click Save)

Upload this resultant .m3u file to your webspace,

To make your MP3 start to play, type in the name of this link into your web browser: (eg// link to http://www.yourwebsite.com/audio.m3u),

This should work, at least in winamp!