Feeding two Amps/Pre-Amps with my PC ?

Hello Everyone,

I'm looking for a solution whereby my PC would feed two different stereo systems simultaneously. The machine I'm considering using has two digital outs SPIDIF and Optical - The preferred approach would be to simpy connect cables to both of these outputs to feed the two stereo systems. From what I've read that will not work - I'm using Windows 7 but am happy to leverage other OS's if necessary to make this work.

I was also wondering if it's possible to use one of the digital outputs on the PC simultaneously with the headpphone jack ? I have another pre-amp that does not have digitial inputs so I would consider simply using headphone to RCA to feed that particular system - and the digital to feed the other.

Any thoughts or suggestions would be appreciated. Thank you !