[extremesanity]

<a href="attachment.php?$session[sessionurl]attachmentid=$attachment[attachmentid]&amp;
d=$attachment[dateline]" class="highslide" onclick="return hs.expand(this)" id="attachment$attachment[attachmentid]">

<img class="thumbnail" src="attachment.php?$session[sessionurl]attachmentid=$attachment[attachmentid]&amp;stc=1&amp;thumb=1&amp;d=$attachment[thumbnail_dateline]" border="0" alt="<phrase 1="$attachment[filename]" 2="$attachment[counter]" 3="$attachment[filesize]" 4="$attachment[attachmentid]">$vbphrase[image_larger_version_x_y_z]</phrase>" style="width: expression(this.width > 140 ? 80 : true);" />

</a>

&nbsp;<if condition="$show['br']"><br /><br /></if>

What elements of this do I need to add to my picture album templates in order to get the same functionality in user albums?

I already added

 class="highslide" onclick="return hs.expand(this)"

but that is not enough to get it to work...