Initially, I was going to post my response here, but I had to confirm something with the original author of the VBS Script (@ryerman) regarding a secondary loop. Nonetheless, I found a better version of FileTouch, FileTouch v1.0.0.3 (12-23-2009) by WinTestGear, which is far more effective than the one you use, and I believe you, along with everyone else, will benefit from it. Here is the post response, by me, to @ryerman: Response to FileTouch v1.0.0.3 (12-23-2009) by WinTestGear. Moreover, I will attach a zip file with @ryerman's ORIGINAL VBS Script for Mkvpropedit.mte, my modification of Ryerman's VBS script to apply towards FileTouch v1.0.0.3 (12-23-2009) by WinTestGear, a .png of the available FileTouch command arguments, and the FileTouch.exe file. Thus, my reponse also provides a list of ways that dates can be represented to be read on the program.
From my modified version of his Original script, Change Line 10 (aka providing the application path for FileTouch v1.0.0.3 (12-23-2009) by WinTestGear, Line 28 to whatever customized Mp3Tag field that corresponds to Windows File Creation date, and Line 45 to whatever field corresponds to Windows File Modification date.
FileTouch v1.0.0.3 (12-23-2009) by WinTestGear (2 .mte, 1 .png, and 1 .exe files).zip (72.0 KB)