Shouldn't be a problem. I don't have an 8000 but I've had my 630 and 2000's apart before now and there aren't any horrors.

The base of the keyboard should separate from the top. All the screws you need to undo are marked with an arrow. Make sure you have a good cross-head (not Pozidrive) screwdriver of exactly the right profile otherwise you may round off the tighter screws trying to get them out - not that they should be tight after sonmeone else has take it apart before you. Don't use a power tool! Some screws may be different lengths; to remember which each goes where I get a piece of card, draw the back of the keyboard on it, mark the screw locations and then screw the screws through the cardboard at the specific location as I remove them.

After that, just take care. If something deos want to move it usually means you've missed a screw or theres a wire still connected. All interconnection wires ought to be on edge connectors or similar; there may well be locking mechanisms on the connectors so examine closely and carefully iuse a small flat screwdriver to unlock. Remove the connector by pulling on the connector, don't pull on the wires!

When re-assembling DO NOT OVERTIGHTEN THE SCREWS! They are only into plastic; you don't want the thing to move or rattle but tightening past this point is unneccesary.