the cue file is not your image, cue files are very small, if open it in notepad it will just be a few lines of text, they are basically instructions that tell burning programs what settings to use.
what program did you use to make the image? there should be more than just the cue file. the other file should be larger, about the size of the CD (say anything around 300-600mb or so). that's the file that needs to be patched, so type in the location to that.
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amber trichomes