I don't know if anyone's documented trying this or not, but I've been trying to learn lucid dreaming for 2 years for a specific reason, and seeing as I haven't obtained lucidity once, I oughta just toss that reason out here and see if it works.
Photoreading is allegedly reading via the subconscious, and there's a bunch of techniques involved (look it up on google for the technicallities). Anyway, seemingly the most successful photoreading stories are after one photoreads a book and then sleeps on it. Now i know reading isn't allowed in dreams, but assuming you have complete access to your subconscious, couldn't you basically just glance at something (assuming that what I've heard of the subconscious having an infinite memory bank is true) and then be able to access every detail of that body via the subconscious? In otherwords, glance at a page using photoreading steps and then ask your subconscious or dream guide during an LD to relay all of that info to your conscious... you can read gazillions of books this way, study for tests, etc. Right?