for the featured product, the code that displays the price is
<h4>$'. (number_format($row_FeaturedRS['ProductPrice'],2)) .'</h4>
for the popular product, the price code is:
<h4>$'. number_format($row_MostPopularRS['ProductPrice'],2) .'</h4>
you can change the dollor sign on those two lines to convert it to the pound symbol.
I will forward you comments about the admin pages to the documentation team.