unzip the file tool, and put your img files into the same directory of the batch file.
if you have more than one file put each file in a separate folder.
launch the "ImgToTar.MD5.bat" to create files with the extension of tar.md5 for each img file.
Note: the script rename the each file starting by "recovery*.img" to "recovery.img" , and files named "boot*.img" or "kernel*.img" image to "boot.img". if your file has another name , don't forgot to rename a recovery image to recovery.img, and the boot image to boot.img.
hope that help some body how search a batch file to create tar.md5 file for using it in Odin.
******************** new version of the script:
in this new version you can combine multiple files ,img and bin files, all of them into one file tar.md5 bundle.
a "AllFiles" directory is created including this result pack file ready to use in new Odin version v3.10.7.