I know - and even more
Thanks.
So ... regarding your example list ... there is a folder structure ...
E:\AUDIO BOOKS\At The Villa Of Reduced Circumstances\
E:\AUDIO BOOKS\At The Villa Of Reduced Circumstances\Disc 01\
...
E:\AUDIO BOOKS\At The Villa Of Reduced Circumstances\Disc 04\
E:\AUDIO BOOKS\Death of a Travelling Man\
E:\AUDIO BOOKS\Death of a Travelling Man\Part 1\
...
E:\AUDIO BOOKS\Death of a Travelling Man\Part 4\
E:\AUDIO BOOKS\Thriller\
E:\AUDIO BOOKS\Thriller\Part 01\
...
E:\AUDIO BOOKS\Thriller\Part 18\
This looks as if can Mp3tag handle this without much additional efforts.
The folder path is constructed as ...
E:\AUDIO BOOKS\%_parent_directory%\%_directory%\
I know you need some other more detailed output result, but did you try the mte script from above pos #4 and does it basically work for you?
If so, then we have a good starting point.
This is irritating ...
E:\AUDIO BOOKS\Thriller\Part 10\01 Spirit Walker .mp3
E:\AUDIO BOOKS\Thriller\Part 10\010 Spirit Walker .mp3
E:\AUDIO BOOKS\Thriller\Part 10\011 Spirit Walker .mp3
E:\AUDIO BOOKS\Thriller\Part 10\012 Spirit Walker .mp3
E:\AUDIO BOOKS\Thriller\Part 10\013 Spirit Walker .mp3
E:\AUDIO BOOKS\Thriller\Part 10\02 Spirit Walker .mp3
What does the three digit track number mean?
This is irritating ...
E:\AUDIO BOOKS\Thriller\Part 13\ 05 Interlude at Duane's .mp3
E:\AUDIO BOOKS\Thriller\Part 14\01 Surviving Toronto .mp3
E:\AUDIO BOOKS\At The Villa Of Reduced Circumstances\Disc 01\01 At the Villa Of Reduced Circumstances.mp3
Why do the filenames have surrounding resp. trailing spaces?
Why is there a double space between the track number and the following part in the filename?
It is also irritating that the folder names do not carry those quirks. 
Track 8 is missing from "At The Villa Of Reduced Circumstances".
Either having leading track numbers of one digit or two digits in the file name or trailing in the directory name should be no problem.
E:\AUDIO BOOKS\Thriller\Part 04\01 Kowalski's in Love .mp3
E:\AUDIO BOOKS\Thriller\Part 12\1 Goodnight Sweet Mother.mp3
E:\AUDIO BOOKS\Death of a Travelling Man\Part 1\01 Death of A Travelling Man.mp3
... but to make life easier I strongly recommend to give the names overall the same wording structure and clean up the folder names and file names as the first step before going on to other activities!
For example:
$regexp(%_filename%,'(?#shrink multi spaces to one space)\s+',' ')
$regexp(%_filename%,'(?#remove leading trailing spaces)^\s+|\s+$',)
$regexp(%_filename%,'(?#remove leading zeroes)^0+',)
Beside the fact of un-systematically named folders and files, are the mp3 files internally well tagged?
Is there a tag field DISCNUMBER filled with the Disc resp. part number?
Is there a tag field TRACK filled with the track number?
Is there a tag field, which carries the album title, e. g. "Thriller" or "At The Villa Of Reduced Circumstances"?
Please explain ...
... generate numerical intervals for filenames or tracks,
(e.g 5-7 or 136-245) which is what I want to be able to do in MP3 Tag
Regarding your question ...
How can I export to a text file showing
Album folder
Part/ Disc folder showing track numbers
... do you want to know what would be the steps of doing so using the Mp3tag user interface?
... do you want to visualize additional informations like track duration, sum of play time, files per folder, folders per album, and such things?
DD.20110225.1231.CET