set shipping and billing addresses

I've create a script that I'm deploying as a suitelet on our website.

It basically creads a prospect, uploads files, creates and opportunity and creates a task.

I am however struggling with the addresses. I have two address field blocks on the form and I want one address to be assigned as the billing address and one as the shipping(site) address. The code i have thought seems to set one address as both, any pointers?

  record.selectNewLineItem('addressbook');      record.setCurrentLineItemValue('addressbook','zip',request.getParameter('zip'));    record.setCurrentLineItemValue('addressbook','attention', request.getParameter('fname') + ' ' +request.getParameter('lname'));    //record.setCurrentLineItemValue('addressbook','attention', 'Ship To: ' + request.getParameter('fname') + ' ' +request.getParameter('lname'));    record.setCurrentLineItemValue('addressbook','phone',request.getParameter('phone'));        record.setCurrentLineItemValue('addressbook','defaultbilling', 'T' );    record.setCurrentLineItemValue('addressbook','addr1',request.getParameter('yaddress1'));    record.setCurrentLineItemValue('addressbook','addr2',request.getParameter('yaddress2'));    record.setCurrentLineItemValue('addressbook','city',request.getParameter('ytown'));    record.setCurrentLineItemValue('addressbook','displaystate',request.getParameter('ycounty'));    record.setCurrentLineItemValue('addressbook','zip',request.getParameter('yzip'));        record.setCurrentLineItemValue('addressbook','defaultshipping', 'T' );    record.setCurrentLineItemValue('addressbook','addr1',request.getParameter('siteaddress1'));    record.setCurrentLineItemValue('addressbook','addr2',request.getParameter('siteaddress2'));    record.setCurrentLineItemValue('addressbook','city',request.getParameter('sitetown'));    record.setCurrentLineItemValue('addressbook','displaystate',request.getParameter('sitecounty'));    record.setCurrentLineItemValue('addressbook','zip',request.getParameter('sitezip'));        record.setCurrentLineItemValue('addressbook','addressee',request.getParameter('company'));    record.setCurrentLineItemValue('addressbook','salutation',request.getParameter('salutation'));    record.setCurrentLineItemValue('addressbook','email',request.getParameter('email'));    record.commitLineItem('addressbook');