how to configure paypal page style in 1.6

[ptivis14]

 I'm using a Paypal account on 2 different stores and I  set up 2 checkout page styles for each stores in paypal

 one of these was set as the primary style and will be used to all stores by default ,

now I want another  to use with my prestashop store, but I don't know how to configure paypal module in prestashop

I searched for answer and I tried to insert the line like   <input type="hidden" name="page_style" value="PageStyleName" />  to file  ' ..hook/express_checkout_payment.tpl',  but it didn't work.

 

Anyone who know the solution, please help me 

 

i'm using prestashop 1.6.0.8 

paypal module version 3.7.1