That particular keyboard was one of my old psr-500s, which were sold a few months ago. I currently use a stacked array of a psr-740 on the top, with a psr-2000 underneath. They're stacked on an Ultimate stand, which I configured to make it nearly "drunk proof." The way it is set up it would take a linebacker to topple the rig from the back side.
As for MP3s, I havn't had time to put any together, but that may be an option sometime in the near future. I have recorded a few demo CDs with five songs each and send them to prospective clients and local agents. They were easy to record and I put detailed recording instructions on
http://psrtutorial.com/ . Some of the folks on that forum said they followed the instructions and made some great CDs. The same technique is also a great way to record your midi files to a CD. Essentially, the sounds you hear coming from the CD are identical to those coming out of your keyboard. I recorded a 10 song album for Will Stewart and he was astonished at the difference between using a midi to wav conversion program and using the technique I described.
Thanks again everyone,
Gary