When our house was built, they papered everything - some with prep and some without. I've had to remove it all unfortunately...
Go buy this thing called a "paper tiger". It perforates the wall paper and you can spray release on the paper and it will soak through to the adhasive. Have one person work ahead with the paper tiger and the release and the other spray more release and peel the wallpaper off in stages.
The key is to get the wallpaper really damp. Use a garden sprayer and don't rush the job. Spray and wait about 20 min or so but don't wait too long though as it may start to dry again. Sometimes a couple applications of release are needed.
Edit: Ha, Sunydog was posting the same thing as me at the same time...
