If you've got hard disk you have to make assigns to your instruments drawer:
Assign ST-16: Work:Instrumentswhere "Work:Instruments" is the directory where you store instruments (samples). The Noisetracker needs just these assigns.
Make an AmigaDOS script so that these assigns are created automatically.
The original contents of those floppy disks are here:
http://aminet.net/search?name=st&path[]=mods/inst&start=0