Hi Peter!
Have you also removed the screw under the sticker at the lower end of the battery compartement?
Once all screws are removed the lower casing comes easely off. To remove the print, change the keyboard or the display you need to remove the nuts that keep the print and the upper plate together.
It's realy a very simple and straightforward job to take the Beo4 apart.
cheers
Foxtrott
"The first thing we do, let's kill all the lawyers."
Henry VI, Part 2 William Shakespeare