I made a booboo when posting the solution.
The line:
Code:
if ($mode == "added") $smarty->assign("cshopping","1");
should be added before:
Code:
if ($mode == "checkout" || $mode == "auth") {
#
# Calculate total number of checkout process steps
and
not this line:
Code:
func_header_location("cart.php");
Sorry about that.
