[cflsystems]

You need to edit skin1/modules/Product_Options/customer_options.tpl and comment out the code similar to this

        {if $v.is_modifier eq 'Y' && $o.price_modifier ne 0}
         (
         {if $o.modifier_type ne '%'}
          {include file="currency.tpl" value=$o.price_modifier display_sign=1 plain_text_message=1}
         {else}
          {$o.price_modifier}%
         {/if}
         )
        {/if}