Tiburn, there's a few threads kickin around on it. Not sure how different tours would be to my 3.0 d22? It's not actually hard, Nissan instructions were very thorough and it came with all parts needed, even rust protecting stuff. It's quite fiddly, gotta be patient, and takes a reasonable sized pair of cohones to cut the hole!
Do it mate, get some snorkel prices, and if you like Nissan one even try more than one dealership, then stick it in yourself, research on here and if not sure ask heaps if questions on here and anyone else you can think of, I'd do it again happily, and as I said I'm a nuffy... seriously! I'm on a tight budget so am learning very quickly!