Sounds like the perfect description of my speakers which are a 4.1 labtec system......if it is this you should find that most of the 3.5ml jack plugs which connect up the system are colour coded to help useually they have two plugs into the soundcard (one for fronts and one for rears) with your subwoofer (the big box) being run from the fronts.....EAX is a cinema encoding system and not really that important unless you are going to be running DVD's thorugh the computer system....the .dll file is i think (jump in here lisaj or button) a driver file so the most obvious thing to do is find the make and model number and update your driver from the company website