No, it's really easy. Download the free Goldwave program and then just open a new stereo sound file. Open whatever sounds you want to put on there and just copy/paste them into either the Left or Right side of the stereo file. Either that or just copy one into Goldwave and open the other sound you want and select it and Mix it with the other sound you pasted into it. That's the short and condensed version, but it's really simple. Or, if you need a specific FoxPro sound, they can mix any of them for you.