hey guys, i need your help setting up my first HD entertainment system. i just bought a 37 in lcd Vizio tv model # VOJ370F, and an Onkyo 7.1 home theater in a box system model number HT-S5100. i also have xbox 360 the white one not the black. i also use the xbox as my dvd player for now until i buy another dvd player. my question is what exactly do i need to buy to hook everything together so i can enjoy HD gaming and movies for the first time. i bought a HDMI conversion kit for the xbox 360 from madcatz. i hooked up the HDMI cable into my tv and the optical cable into the receiver, it works fine when im playing games on xbox but when i put in a movie i only get sound. any ideas on that problem would also help me out alot.