Been using Noteworthy for about 3 years arranging for a 12 part band but still no expert.
Yesterday was the first time I used the Percussion Track (CH10) and as reference, I wrote a chromatic scale from octave 1 to octave 6 and then added a Lyric line with short tags of the sounds e.g. "Snare", "Crash" etc. as a lookup "Percussion Library" for cut and paste into any drum line.
All worked well until suddenly the sounds changed (what was percussion instruments became sound effects; footsteps, shrieks, gunshots etc.) Try as I might I cannot get it back to the original.
I have upgraded from NWC 2.5 to 2.75 recently and had to change the Windows 7 Pro device to Microsoft GS Wavetable Synth but it was working on that device before.