[jeremye]

I made a few customizations to this after I noticed that this custom order invoice does not display discounts and/or coupon code (gift certificate) discounts. In /skin1/orders/invoice.tpl, I added:

{if $order.discount gt 0}
  <tr>
    <td width="600" height="1" colspan="5" bgcolor="#E1E1E1">
    <p align="right" style="margin-right: 5"><font size="2"> 
    Discount:</font></td>
    <td width="92" align="left" height="1" bgcolor="#E1E1E1">
    <font size="2">{include file="currency.tpl" value=$order.discount}</font></td>
    <td width="314" align="center" height="1"></td>
  </tr>
{/if}
{if $order.coupon_discount gt 0}
  <tr>
    <td width="600" height="1" colspan="5" bgcolor="#E1E1E1">
    <p align="right" style="margin-right: 5"><font size="2"> 
    Gift Cert.:</font></td>
    <td width="92" align="left" height="1" bgcolor="#E1E1E1">
    <font size="2">{include file="currency.tpl" value=$order.coupon_discount}</font></td>
    <td width="314" align="center" height="1"></td>
  </tr>
{/if}

Put that immediately before:

  <tr>

    <td width="600" height="1" colspan="5" bgcolor="#E1E1E1">

    <p align="right" style="margin-right: 5"><font size="2"> 

    Shipping:</font></td>

    <td width="92" align="left" height="1" bgcolor="#E1E1E1">

    <font size="2">{include file="currency.tpl" value=$order.shipping_cost}</font></td>

    <td width="314" align="center" height="1"></td>

  </tr>

That will only show the discount or gift certificate if one exists. It tested fine for me.

Jeremy