Your cinema system is like mine,
What about v box and blu-ray player via optical cable using a splitter
http://shop.ebay.co.uk/?_from=R40&_t...All-Categories
1 optical into the spliter then 2 going out ( 1 to vbox, 1 to blu-ray)
My cinema system has digital out (optical) which when using a spliter it picks up the sound from which ever is playing (vbox/bluray)
and 2 AUX out
then
v box to TV using scart, and blu-ray player using HDMI
Then the Wii using the AV cables to tv.
or have a look at this
http://support.sony-europe.com/tv/tu...site=odw_en_GB