Ok, I kind of knew this was coming...
Checked the meaning/relation of DOM, node, firstchild etc, but it's just not possible to apply my needs to what they are suggesting.
Would it be too much to ask you for further help on this since slimbox is not WA products? If you could it would be great and this is my image link to activate slimbox on my gallery page;
<a href="images/detail/<?php echo $row_race2012['FileName']; ?>" rel="lightbox-detail" title="<?php echo $row_race2012['Title']; ?>" >
<img src="images/Thumbs/<?php echo $row_race2012['Thumbs']; ?>" alt="<?php echo $row_race2012['Thumbs']; ?>" /></a>
And how would I change the link mapper function?
return [el.href, el.title];