Disklavier

Hello everyone.  I have an mx100II with TG100 tone generator.  I have successfully hooked up my computer through a midi to usb cable and am enjoying playing thousands of midi files from online and this group.  

I am looking for a simple program that will allow me to make a playlist and play several songs from my computer adding and removing from the list as I choose.  Do you have any recommendations?  Right now I am using mighty midi.  I like the simplicity of it, but I can only open and play one song at a time.

Thank you.