You can do this by the Buy Button changing to Download All. Then in the buy link when editing a track have the URL of the where you can download all the tracks
Here’s how I changed the code in Bold by adding “text_buy_tracks+DownloadAll”-
<object height=”300” width=”300”>
<param name=”movie” value=”http://player.soundcloud.com/player.swf?url=http%3A%2F%2Fsoundcloud.com%2Fdavid-adams%2Fpaid-dues-test-2&text_buy_track=DownloadAll&auto_play=false&player_type=artwork&color=000000” />
<param name=”allowscriptaccess” value=”always” /> <embed allowscriptaccess=”always” src=”http://player.soundcloud.com/player.swf?url=http%3A%2F%2Fsoundcloud.com%2Fdavid-adams%2Fpaid-dues-test-2&text_buy_track=DownloadAll&auto_play=false&player_type=artwork&color=000000” type=”application/x-shockwave-flash” height=”300” width=”300”></embed>
</object>
</p>
