Just wondering, what would my process be: Do I need to simply paste this code in Command Prompt after I do the following?
No, you would paste the script into a text editor and save it as a filename.bat and be careful not to use a system command as the filename.
Then:
Step 1: Create a Text file with the serial numbers as a certain filename
Step 2: Log in to the https link
Step 3: save the web page
as text with the list of all the files, and save it as a certain filename.
Step 4: put all the files together and run the batch file, which will create a filelist of the files containing the 8 digit serial numbers.