You can add this into myalbum*_photo_in_list.html or myalbum*_photo.html in your template set.
<a href='<{$xoops_url}>/modules/tellafriend/index.php?target_uri=<{$mod_url|escape:"url"}>/photos.php%3Flid%3D<{$photo.lid}>&subject=a%20photo%20for%20you'>TELL A FRIEND</a>