Thanks Jason. I solved the image not appearing in results.
In line 313 of results.php this now works:
<div class="WADAResultThumbArea"><a href="products_detail.php?ProductID=<?php echo($row_WADAproducts['ProductID']); ?>" ><?php echo(isset($_GET["pageNum_WADAproducts"])?"&pageNum_WADAproducts=".intval($_GET["pageNum_WADAproducts"]):""); ?><img class="WADAResultThumb" border="0" src="images/products/<?php echo($row_WADAproducts['ProductThumb']); ?>" alt="<?php echo($row_WADAproducts['ProductShortDesc']); ?>" width="150"/></a></div>
What I previously had, incorrectly, was a quotation mark (") after images/products/ But the section of the line <?php echo($row_WADAproducts['ProductThumb']); ?>" is actually doing the adding of the final part of the path address. So no " needs to go in-between after src="images/products/
I do not have this uploaded yet, and I will see if I can find the similar mistake on my details page. I'll only request your help if I can't fix the details page myself. Again, the category menu is another issue, and that I'll ask your guidance on in a separate post, after I've uploaded all for you to examine. THANKS!