I have made new export in Music Playground export (milkaPlayground_03_bat_Music_Playground_Files_Extractor.zip) that creates batch file for extracting images from cab in %appdata%\Mp3tag\export\ to workingdir.
Here is the code:
$filename(%_workingpath%%_workingdir% ---- Music Playground ----.bat,ansi)ECHO OFF
:Creates "_Music_Playground_Files_" directory
IF not EXIST "%_workingpath%_Music_Playground_Files_\" md "%_workingpath%_Music_Playground_Files_\"
:Unpack files from "milkaPlayground 04 Music Playground Files.cab" to "_Music_Playground_Files_" directory
EXPAND "'%'appdata'%'\Mp3tag\export\milkaPlayground 04 Music Playground Files.cab" -f:* "_Music_Playground_Files_"
:Deletes created batch file
DEL "%_workingpath%%_workingdir% ---- Music Playground ----.bat