Well, I appear to be mistaken! When I wrote my last post I hadn't actually tried it out. Today I was playing some Fifa on PS3 and on my Beo 5 there was an AV button. I hit that and it gave me CD and RADIO buttons. Pressed CD and on came the CD, muted the Playstations sound and kept the picture on the screen!
Worth trying it out, seems to be working here with BV8-32, BS9000, BL3.
Robert.