Anyone done one? The service manual covers the E5400 as well, and only shows the procedure for that model. That one is bog standard - remove 5 screws and the cover comes off. The E5500 has one central screw and, in my case, part of the left side of the cover is sticking up but the cover won't move. I'm starting to wonder if there are other retaining screws accessed from under the keyboard - not that I can see any pressure points to spring the keyboard out. Similarly, there's no obvious recesses round the cover edge for inserting a small screwdriver to spring it out.
I'll carry on experimenting, but I need it for Monday and don't want to turn up at the place I'm working with a laptop held together with tape!