[shan]

try this.

this checks for a detailed image and if it finds one shows the first . if it dont it shows the thumbnail instead.

{if $images} 

{**** START - SHOW FIRST DETAILED ***} 

{section name=detailed loop=$images} 
{if $images[0].tmbn_url} 
[img]{$images[detailed].tmbn_url}[/img] 
{else} 
[img]{$xcart_web_dir}/product_image.php?imageid={$images[0].imageid}[/img] 
{/if} 

{/section} 

{**** END - SHOW DETAILED ***} 

{else} 

{**** START - SHOW THUMB ***} 

{include file="product_thumbnail.tpl" productid=$product.productid image_x=$config.Appearance.thumbnail_width product=$product.product tmbn_url=$product.tmbn_url id="product_thumbnail"} 

{**** END - SHOW THUMB ***} 

{/if}