I Just recieved my system also and I really like it even though I have not spent that much time with it yet as far as tweaking sub woofer levels vs. eq'ing the keyboard differently.
As for the stereo thing, In the effects section, you can choose from different setups. Stereo, (which uses just one pair of satelites) Stereo2 (which uses all 4 satelites) And the movie and music choices which will include the center speaker and surround sound balances. I hope this helps you.
Would explain in greater depth but running late for work now.
Good luck
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The old Newb

[This message has been edited by OldNewb (edited 03-04-2005).]