Managing Type and Creator Codes from macOS/MacOS X

Here is an applescript you can compile to an application for drag and drop purposes to set Creator and Type codes. You can modify it to suit your needs.

-t is for TYPE and -c is for CREATOR

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on open filelist
repeat with i in filelist
do shell script "SetFile -t 'TEXT' -c 'R*ch' " & quoted form of POSIX path of i
end repeat
end open