My first techy question - how do you internally disconnect the tone generator from its keyboard in the PSR3000?

I'm pretty new to MIDI and sequencing, so would appreciate any held and advice. I'm connected to my PC via USB, and it all seems to work fine from the MIDI samples I've played.

I've downloaded a demo of XGWorks, and using the XG Editor you can assign a sound to a particular channel and have it transmit the code to change the tone on the PSR3000. However, when I do this and play a tune on the keyboard, two sounds play (the one selected in the XG Editor and the one currently selected on the PSR3000).

Any help would greatly appreciated.