theres really no difference editing a data assist created page to show images versus creating the page from scratch.
in the page you sent, the problem is that way you are adding the path to the image source. you adding the path inside the recordset column name:
src="<?php echo $row_WADAproducts["../ProductImage"]; ?>"
and it should be added outside of the recordset echo:
src="../<?php echo $row_WADAproducts["../ProductImage"]; ?>"