This report is the result of our work during the European Project Semester (EPS) conducted at Oslo University College during spring 2006. The EPS program gáthers students with different background from all over the world. Project management and methodology is taught and the students carry out a project in groups of tour for a client. Our group was assigned todo a project for the company Telenor. Originally, we should have worked on AJAX with the college, but the company came to our supervisor Simen Hagen with a tapie for us. First, it was related to developing an IMS (IP Multimedia Subsystem) application, but dueto some technical restrictions and lack of software we moved on to another project: work on a peer-to-peer personal video recorder system. The project codename Springfield was chosen by the students after the names of the computers used during the project: Homer, Marge, Bart and Lisa. We would really like to thank Oslo University College, the EPS coordinators Johnny Berre, Jorunn Fergus and Terje Harberg, the tutors David Swetnam, Agnes L. Hayman, Reidar Kvadsheim and the various lecturers. We particularly thank our supervisor Simen Hagen for his support and advice all along the project, as well as Per-Steinar Hansen and Torbjorn Sund from Telenor R&D.