Paypal Express Checkout API Calls

[MastaSplinta]

Hi there, brand new to prestashop.

 

I am using the lastest Paypal Payments module. 

 

I have Express Checkout only enabled.

 

I would like to allow customers to pay without setting up a paypal account.

 

I have found the code needed to allow this to happen, but I am not sure which file to actually insert the code into. 

Here is a reference that I found, but it is very slim in detail. 
http://www.prestasho...ype#entry781842

Could you please direct me to the location and specific line in which I need to edit? 

 

Thank You

 

Tom 

 

This is the code: 

 

 

if ($this->_pp_integral)
$request .= '&SOLUTIONTYPE=Sole&LANDINGPAGE=Billing';
else
$request .= '&SOLUTIONTYPE=Mark&LANDINGPAGE=Login';