Yes. I believe it is possible
For the sub you will need to get some kind of an addaptor for one of your cables that goes to your computer.
Make it into 2 regular speaker wire, ( red and black wire ) 1 set for left, one set for right.
Take one set and hook it up into the sub output.
Take the speakers hook them up into the speaker outputs.
But when doing this make sure that the reciever doesnt put out enough power to blow the satalites.
It is kinda risky.
Another way is to :
Once again get an adaptor but make it for both of the Wires ( the front and Rear wires that go into your computer )
2 sets of wires for each
1 for left, one for right.
Hook up appropriatly.
The Front left to Front left
The Front right to Front right.
The Rear left to REar left.
Rear Right to Rear right
That should get you all your Hi, Mid and low frequenceys.
But once again that is dangerous.
I would if I were you keep your Reciever turned low, and make a sign or something saying "DONT TURN UP OR I KICK YOUR ***!"
Because if you have lets say 60 watts coming out of you reciever per channel. And that tured up.
Then you have your Promedias turned up... Thats ALOT more power than these things are designed to handle.
So this way you can, Keep the Pro Medias turned down (actualy now that I think about it.. this is the better way.. )
And just make sure you dont turn your reciever up to loud.
Hope this helps
Every one correct me if I am wrong.