Windows: remove initial characters from file names

In my continuation of last post, if you do not have a specific pattern to delete, but you know the number of characters to delete, you can use following script. Following script will remove initial 5 characters from the file name. (you can change 5 to any number, ofcourse)

@ECHO ON
FOR %%F IN ("*.mp3") DO CALL :process "%%F"
GOTO :EOF

:process
SET oldname=%1
SET "newname=%~nx1"
SET "newname=%newname:~5%"
RENAME %oldname% "%newname%"