I got an Yamaha PSR-550 and I would like to know if there is a possibility to use new sounds with it... downloading from a website and saving on disc...or maybe even better: is there a program which has cool trance sounds which i could use with my keyboard? (is it even possible to connect the keyboard to the pc for controls?) what cable would i need for it? can i also use it for atomix virtual dj?... thx