Asus cine5, PS3 & itunes

Does anyone know if it is possible for the Asus cine5 to do the following:

1. connected to PC- can a second source be connected to the headphone socket or any type of splitter/cable to allow a PS3 to use it as well- not at the same time though!

2. does itunes output 5.1 sound or 5.0 sound as the cine5 has no subwoofer? If itunes does, how and where?

Sorry to be Mr Thicky the Thick from Thicksville, who just entered the thickest man in thicksville competition but am thinking of giving one of these to my son so he can use his PS3( when Santa arrives with it!) along with his PC so I can keep the missus happy with "no Blo*dy speakers or cables"

TVMIA