First, read How to use Native Instruments' Kontakt sampled instruments. I loaded the 4 Melodic instruments, the 5 Single Percussion instruments, and Hand Percussion instruments into Kontakt's Multi Rack. There are a lot of Cuban music samples in the Percussion Ensembles and the Melodic Ensemble, but PianoRollComposer is all about composing, not copying (although I thoroughly enjoyed listening to the samples, and I might use a phrase or two). I then saved the Multi Rack as "Cuba.nkm". Download that file by putting http://jdmcox.com/Cuba.nkm in your browser's address window. You also need to put: http://jdmcox.com/Cuba Percussion.zip in your browser's address window to download that file, and then unzip it. AND download CubaInstruments.txt. If you're using the 64-bit version of PianoRollComposer, open CubaInstruments.txt and save it in Unicode Encoding. And do the same with all the files in the Cuba Percussion folder. Put the Kontakt player, the Kontakt VST plug-in, Cuba.nkm, CubaInstruments, and the Cuba Percussion folder in your Music folder. In PianoRollComposer, you can either select a virtual MIDI port in Midi Out or the Kontakt VST plug-in on the menu. Select Files -Load and Cuba.nkm in the Kontakt window. PianoRollComposer shows the 10 Cuba instruments in Instruments by selecting File -Plugin/Port Instruments and Cuba Instruments. Six of them are Cuba percussion instruments with various sounds. PianoRollComposer will play all the Cuba sounds that pertain to the keys on the Virtual Keyboard for each instrument. To see where on the staffs a percussion sound goes, select Show Note Name/Number at Cursor in Options.