it would be a total waste of time... Bose is nothing special. Add an Alpine CD changer if you want 6 disc convience.... and upgrade your factory speakers with something decent... Crutchfield usually has some good specials. If then, the sound isnt quite loud enough or clear enough, add a 4 channel amp.

Adding bose would not be fun, you'd need wirring from the deck to the amp (the base RSX does not have an external amp) and then from the amp to all the speakers. But its more than just that... the bose headunit only puts out a VERY low level audio signal, so it is very easy to introduce noise into the system, not just any wirring would do.