all i can say is try with a test file, but what you propose seems as if it would work. since my 80prs doesn't play FLAC i have to transcode to ALAC for my ipod.
if it doesn't work you might have to download DB Poweramp. (thats what i use for xcode)
if it doesn't work you might have to download DB Poweramp. (thats what i use for xcode)