Based on the information here
I just tested putting -f "Cover.jpg" -p "<Path>" at the end of my command line in MB's tools and it worked just fine.
Edit: In MP3Tag I used -f "Cover.jpg" -p "%_folderpath%"
I always wanted to do this but never thought about how to actually accomplish it before, so thanks for the inspiration. Have a wonderful day!
A smile is happiness you'll find right under your nose.