To get a compatible 1.6 template from 1.5 version, there are just two
steps to make them work with elgg 1.5 properly.
1. Replace the mod/your_theme/views/default/page_elements/header.php
from template mod folder with the original header.php from views/
default/page_elements/header.php
2. if JS folder is avialable at you theme folder in directory, mod/
your_theme/views/default/js/
then replace all the files with the files from
views/default/js/, means copy all the files from this folder and
paste into your theme's js folder.