Customize web-based program

I am using a web service called Optin Accelerator (OA) that is a viral tell-a-friend application. OA lets people open their email address books on the page (Gmail, Yahoo, etc) and click on addresses. I want to be able to record how many emails each person sends. I will offer an incentive where each email address entered is an entry into a prize drawing. (More email addresses = more entries.) I also need to change some fields from English to Norwegian, e.g. "Your Name", "Friends Name".