Hi,
Assuming you have a B&O TV as Video Master and for Surround sound
My guess is that you have to use a SCART splitter, then run one SCART lead to TV and the other SCART you can either run direct to the projector (If projector have SCART input), or convert to RGB with for instance CYPRESS converter CSY-2100.
On Beo4 you then use the AV+DVD command that would start the DVD with surround sound but without TV picture, and hopefully you would now have a signal to the projector.
Br
Thomas
7-40 Mk3, Beo5/Beo4, Avant32DVD, BS3K, PentaIII, BL4K, BL Active w/BL2500, Avant28CTV,Beoport, AppleTV, 2xBC6K