you will to make a div for that image, and position the music player over top of it.
here is the code to position the image you want behind the player:
CODE
<style>
.playerbg {position:absolute; top:###px; margin-left:-###px; left:50%; width:###px; height:###px; background-color:000000; z-index:1;}
</style>
CODE
<div class="playerbg">
<img src="PLAYER BACKGROUND IMAGE URL">
</div>
here is the code to move the player on top, just position it to where you want it.
CODE
<style>.a {position artist/band player}
td.text object {position:absolute; top:###px; left:50%; margin-left:-###px; z-index:9;}
td.text td td object {position:static; margin-left:0px;}
td.text div object object {position:static; margin-left:0px;}</style>
Let me know if you have problems