There are a few errors in that guide, and the 'TSO' format is now obsolete with the introduction of trk23doZ (that format will work with trk23doW, and trk23doF though)
Just start with trk23dow though, you need to learn the basics, and know how to use that program's other useful functions which are omitted in the later versions (f and z).
Plus it's run in DOS so that makes it harder
