[pcparts]

And i just tried this on a stock 4.1.11 product.tpl

change this part

{if $active_modules.Detailed_Product_Images ne "" && $config.Detailed_Product_Images.det_image_popup eq 'Y' && $images ne '' && $js_enabled eq 'Y'}
{include file="modules/Detailed_Product_Images/popup_image.tpl"}
{else}
{include file="product_thumbnail.tpl" productid=$product.image_id image_x=$product.image_x image_y=$product.image_y product=$product.product tmbn_url=$product.image_url id="product_thumbnail" type=$product.image_type} 
{/if}
{if $active_modules.Magnifier ne "" and $config.Magnifier.magnifier_image_popup eq 'Y' and $zoomer_images ne '' and $js_enabled eq 'Y' and $printable neq 'Y'}
{include file="modules/Magnifier/popup_magnifier.tpl"}
{/if}

With this

{* PHP Site Solutions - Dynamic Images *}
{if $active_modules.PHPSS_Dynamic_Images ne ""}
{assign var=phpss_dyn_img_width value=$config.PHPSS_Dynamic_Images.phpss_dyn_img_prodtpl_img_width}
{/if}
{* / PHP Site Solutions - Dynamic Images *}
{if $active_modules.Detailed_Product_Images ne "" && $config.Detailed_Product_Images.det_image_popup eq 'Y' && $images ne '' && $js_enabled eq 'Y'}
{include file="modules/Detailed_Product_Images/popup_image.tpl"}
{else}
{include file="product_thumbnail.tpl" productid=$product.variantid image_x=$phpss_dyn_img_width|default:$product.image_x product=$product.product tmbn_url=$product.image_url id="product_thumbnail" type=$product.image_type} 
{/if}
{if $active_modules.Magnifier ne "" and $config.Magnifier.magnifier_image_popup eq 'Y' and $zoomer_images ne '' and $js_enabled eq 'Y' and $printable neq 'Y'}
{include file="modules/Magnifier/popup_magnifier.tpl"}
{/if}

Hope this helps.