PDF View As show icon instead of filename

Hello All.
Newbie to PHPRunner

Is there a way to show an icon instead of the filename in list view for a PDF attachment when it is set to be "View as PDF"
After I perform the initilize script it populates the following:

$this->settings["option1"] = "value";
$this->settings["option2"] = 0;

Are there any settings that I can use to show the PDF icon "images/icons/pdf.pdf" ! the list view where a user clicks the icon and it opens the PDF.

Thanks!