Change default currency in Paypal checkout on .php built site

Change default currency for paypal Express checkout and Paypal standard on my .php bases site. ## Deliverables I have a .php based site for selling gadgets. I have two paypal moduls that are installed but the default currency in the coding is in USD so whenever i try to do a payment the payment happenes in USD, I need to change this so that the payment from paypal goes in NOK (Norwegian Krone). I will give you the nessesary files to modify, but I am not sure witch files you have to do this on. You will be geting access to the adminpart of the page to check , and I willalso upload the .php files to the site. the site is [login to view URL]