How do i get pics from my Pc to my 360 + have them as my Gamer Picture Without having Windows Media Center?

^^ That's my Question. I Tried putting pictures on my Zune +Then connecting my zune by Usb but it only says do i want that picture to be my Background not Gamerpic, If i can't do it without Windows Media Center, Where can i download media center for free, For Windows XP ?How do i get pics from my Pc to my 360 + have them as my Gamer Picture Without having Windows Media Center?I dont think you can have your own gamer pictures