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Tiles offers a more robust way to put together web pages. Although the technology is roughly equivalent to the include mechanism of JSP pages it can offer a lot more if a lot of thought goes into setting up the pieces correctly. There is no reason Tiles cant be used right away with the approach recommended, this is simply pointing out that to make effective use of Tiles, would require some more time in coming up with the best ways to use it.
Cris J. Holdorph~holdorph