Hello............and WARNING!!!!!!!!!!!!

You will spend TOO much time on the link below. It has THOUSANDS of user and professionally made PSR styles to download. Your PSR-620 should be able to playback most PSR styles. Most PSR styles are made to be played on any PSR keyboard. The styles made for the more expensive PSR models will still play on the less expensive ones. I have downloaded tons of these files and have been very pleased. I use a computer program called PSR Performer which lets me play any PSR file on my computer... that way I can easily preview a bunch of downloaded files and only transfer to floppy (or send direct thru MIDI cable) the files I like. Enjoy.....
http://home7.inet.tele.dk/js/musik/740pages/link7405.htm