any include statement with .. in it needs to be changed to $xcart_dir."/
Example:
Code:
include "../smarty.php";
Version 3.5.0 needs:
Code:
include $xcart_dir."/smarty.php";
New changes in 3.5.x will break any previous version custom mods, the above should fix the error "Can't to find template engine!".
Happy X-Mas!