How to batch change the date of a long list of files within a folder, based on timestamps from a different folder?

My situation is the following:

• At some point I got a large database of music files, in mp3 format.
• I added album covers using MP3tag automatically.
• That software changed the timestamps of all my music files to some new values.
• I still had the pre-changed files, the files with the original timestamps.
• Now, a dilemma – based on 1,000 files with old/new timestamps, how can I transfer the old timestamps to new timestamps?

The solution proved a bit difficult. I detail it, below.

The process is detailed in the attached document »

I also partially detail it here:

• Download File Time Changer » (direct link»)
• Download File Touch »
• Create two folders: 1. A folder with the original files, with the original timestamps.  2. A folder with the new files, different timestamps.
• Run a command prompt 
• Change directory to the old folder
• Run this command: dir /O:GNE /b >a.txt
• Excel – Create First Batch File based on TXT file – step 1 – copying to Excel
• Excel – Adding two columns
• Notepad – Copy & paste to notepad
• Notepad – Remove tabs and empty spaces
• Windows Explorer – Save as bat and run in the OLD folder
• Excel: Copying to Excel, adding two columns – The left column is an index. The second one is just self-repeating.
• Excel: Sorting by index
• Excel: Keeping only the relevant rows
• Excel: Sorting by index
• Excel: Messing a bit with the date format
• Excel: Adding another index column
• Excel: Sorting so date we can change the date
• Excel: Change date format
• Excel: Sorting again, this time reversed, so time is first in list
• Word: Copy & paste to word
• Word: First search & replace – SEARCH & REPLACE :00^p with :00 ” (pay attention to quotes, they should be in autoformat as you type straight quotes)
• Word: Second search & replace – SEARCH & REPLACE [space] ^p with quotes ^p (pay attention to quotes, they should be in autoformat as you type straight quotes)
• Excel: Copy & paste from Word, adding the command to run the software
• Notepad: Copy & paste to notepad
• Notepad: Search & Replace ” ” (tab, as pressed on keyboard) with space
• Notepad: Search & Replace ” ” (double space) with ” ” (space). Repeat.
• Explorer: Save the file with BAT extension and run in THE NEW folder

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