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After you have checked the sub floor and made any repairs that are needed you should be able to just roll out the felt paper (tar paper). As long as the sub floor is flat and in good shape there really wouldn't be any need of the extra ply. The felt paper is only used as a vapor barrier.
Check the laminate that you like, many times now a days good quality laminate will come with a vapor barrier and padding attached to the laminate floor boards.
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