1) Get a BeoLink Active w/IR eye
2) Get the appropriate cable from SoundsHeavenly to connect the audio output of your PC to the "PC" input of the Active. Now, select "PC" on your remote to listen to your PC, or N.Music/N.Radio to listen to BS5
3) Wait for B&O to support remote BS5 music selection on the Beo6
OR
1) Connect BL4000s to your computer
2) Install BeoPlayer on your computer and connect to your BM5 (assuming you have one) and select music on your BS5 to play via your computer.
Stan