Add a text in the order payment page

[ipelweb]

I 'm trying to customize the order payment page (step 5),

it's the page shown just before the order confirmation (see my screenshot).

 

The text to add in this page is a simple sentence that include the variables "order-ID" and the "total amount".

Example od sentence to add: "Your order number is: XXX and the amount is: YYY"

 

I guess that the first thing to do is to add the sentence and the 2 variables in the controller (probabily in the file "OrderController.php" or "OrderDetailController.php" Im not sure...)

 

Then the last step should be to add {$my_sentence} in the "order-payment.tpl" file?

 

I'm familiar with PHP, i just need to understand what files/function i need to edit.

Could someone help me? 

 

PS: My prestashop version is the 1.4, as payment module there is paypal pro and wire.

Edited November 17, 2014 by ipelweb (see edit history)