You can play around with the code to make it how you want, but something like this should work.
code:
<a href="http://www.mcinferno.co.uk"
onClick=window.open("http://www.mcinferno.co.uk/force-download.php?file=Has%20Got%20Me.mp3")><img src="http://img103.imageshack.us/img103/9824/mcinfernocoukkb9.jpg" border="0" alt="www.mcinferno.co.uk" /></a>
Note: in IE it may asked about blocked popups.
Thats the only way i can think of opening 2 windows with one link, but you could also do want you want in a slightly different way, by linking to your page by the image, then in the source your main page, you have an onload function to link to the music.
Not sure if this is the best way to do it, someone can correct it if im wrong - i'm not great with html/javascript.
code:
<body onload=(window.open("http://www.mcinferno.co.uk/force-download.php?file=Has%20Got%20Me.mp3")>
Both methods will work, but there might be a better way which i don't know.