I have a BC9500 and a pair of BL8K. But not a Bno TV ,now I want to enjoy some surround sound from my dvds. How can I involve my BC9500 in a surround-setup ? What additional hardware is required ? Going to buy next week a pair of BL4000 for the "background".

The 9500 is only stereo so you can only use it for front channels. It the TV has a line output for the front channels, attach that to the Audio Aux and that will work. I would however consider buying a Beovision 3 or Avant. They are incredibly cheap now and will blow away any modern TV in picture quality. Make sure it has surround sound and get the 32" model - much better!