Thanks Ztruker. The boys over there at StackOverflow solved it for me. (You have to use a For loop.)
To those that come across this thread: just right-click and create a new Text Document file and name it whatever you want, and locate it wherever you want, but you have to change the .txt file extension to .bat for it to run (e.g. GetFileNames.bat), and paste the DOS Basic code below into it. Change the directory values in the code as needed, and also whatever resultant inventory file name you want. Double click on your new Batch file from within Explorer to generate the new inventory text file (e.g. dork.txt -or- name it FileInventory.txt).
Each time you run the Batch file, the old inventory file will be overwritten, so you'll have to move it first, or just rename it, if you want the old inventory values.
Also note that you can change the *.* value to .pdf if you want an inventory of just the PDF files. Or .mp3 if you just want those music files, etc. Any file type you want an inventory of.
> "C:\temp\dork.txt" (
for /F "eol=| delims=" %%F in ('
dir /B /S /A:-D "E:\media\trainingvids\*.*"
') do (