That black on yellow looks fabulous!
I have printed other items out and sprayed them as Holly suggested, but not wallpaper. I have found that I like using scrapbook paper. You can often get it on sale (5 for $1) and with the 12"x12" size I find that there isn't too much seaming.
I have used Yes paste for the paper based on a rec. from one of these posts and it works really well. It is really thick so I mix it with a tiny (really tiny) amount of water and stir it up well. then I use a credit card to apply it, very sparingly.