I can see the difficulty, all right. Your penny whistle notation will be in D or G depending on whether you are playing the note C sharp or the C natural; you the will transfer that fingering to the appropriate whistle (C of F)- you'll know all this. If you were using the G fingering then that means your whistle would be an F whistle. Two work out the harp tab from this lot would be hard. Better to get a book with the tune and right it out for a diatonic harp in the same key as the book's. Then, the harp player can decide whether to use cross harp to give him more draw notes for effect or not.