To expand on Don's comment....the September 1998 issue of FineScale Modeler has an article on the movie model. It was 45 feet long and was 1/20 scale. I say "was" only because I have no idea where it is at this time. Whether or not it toured.....I don't know, either.
There was another model....at 1/48 scale and about 18 feet long.....that was built by a man named Peter Davies-Garner. THAT model toured around the country and I believe it was at the Titanic exhibition in Branson, MO for a while. There was a book written about the build process called " RMS Titanic: A Modelmaker's Manual" which is pretty much the definitive bible of Titanic detailing.
As to wallpaper and tile images, there's an acquaintence of mine from the UK who has done up some fantastic downloads and created a website where they are posted for download....free. The link is below:
http://titanic-ma.weebly.com/
He's done quite a bit of research for these images so they are as accurate as they can be. Some info was based on Olympic, but most was researched through various authors and the odd History Channel personality.
Each image is set up to automatically print at 1/350 scale, but there is a scale next to each image so that they can be resized to 1/144 or whichever size you need. Below is a post over on the titanic-model.com website where he put up an image of one of the cafe walls. Pretty detailed stuff.
titanic-model.com/.../dcboard.php
As Forrest Gump says.....That's all I have to say about that.
Matt