[Victor D]

There is should be enough place to display 5 products
change in your customer/main/featured.tpl

    {include file="customer/main/products.tpl" products=$f_products featured="Y"}

to

   {include file="customer/main/products.tpl" products=$f_products featured="Y" per_row=5}

and in your customer/main/products_t.tpl

{list2matrix assign="products_matrix" assign_width="cell_width" list=$products row_length=$config.Appearance.products_per_row}

to

  
{if $per_row}
{assign var=row_length value=$per_row}
{else}
{assign var=row_length value=$config.Appearance.products_per_row}
{/if}
{list2matrix assign="products_matrix" assign_width="cell_width" list=$products row_length=$row_length}