[dfawdon]

For clickable thubmnails, here is my thickbox_productpage.tpl

{if $images ne ""}
<div style="white-space:nowrap;color:#D90000;font-weight:bold;padding:2px;margin:10px 0 4px;">{$lng.lbl_detailed_images} &not;</div>
{section name=image loop=$images}
{if $images[image].avail eq "Y"}
{if $images[image].tmbn_url} 
<div style="white-space: nowrap;padding-left:10px;"><a href="{$images[image].tmbn_url}" title="{$images[image].alt|escape}" class="thickbox" rel="[detailed]"><img src="{$images[image].tmbn_url}" width="75" style="border:0;" alt="{$lng.lbl_click_to_enlarge|escape}" /></a></div>
{else}
<div style="white-space: nowrap;padding-left:10px;"><a href="{$xcart_web_dir}/product_image.php?imageid={$images[image].imageid}" title="{$images[image].alt|escape}" class="thickbox" rel="[detailed]"><img src="{$images[image].tmbn_url}" width="75" style="border:0;" alt="{$lng.lbl_click_to_enlarge|escape}" /></a></div>
{/if}
{/if}
{/section}
{/if}