A few options:
1. Change the wording of any or all of those items which you say are causing confusion. You have control over them all. ie: maybe change the Option Name to "Media Format:" and then the radio button can be left as "download". You could also change "Please Choose:" to something like "Product Delivery Details:".
2. You could look up the section of HTML to apply display:none to, and add that to your stylesheet. In your case the HTML for that part of the page is:
Code:
<!--bof Attributes Module -->
<div id="productAttributes">
<h3 id="attribsOptionsText">Please Choose: </h3>
<div class="wrapperAttribsOptions">
<h4 class="optionName back">download</h4>
<div class="back">
<input type="radio" name="id[6]" value="6" checked="checked" id="attrib-6-6" /><label class="attribsRadioButton zero" for="attrib-6-6">download</label><br />
</div>
<br class="clearBoth" />
</div>
<br class="clearBoth" />
</div><!--eof Attributes Module -->
... so you'd put this in your stylesheet if you wanted to hide it:
Code:
#productAttributes {display:none;}