The detailed images text is controlled by your language label. You can edit your language label, or you can edit the file where it is controlled.
See the first two lines:
Code:
{if $images ne ""}
<div style="white-space:nowrap;color:#D90000;font-weight:bold;padding:2px;margin:10px 0 4px;">{$lng.lbl_detailed_images} ¬</div>