Here are some pics of a box I constructed and placed under the bridge deck of Rhapsody.  It is totally removable and while I have yet to decide what to store in this space is does indeed add "some" room.

Engine overhead storage box in the closed position.

Engine overhead storage box with the lid removed.

Engine overhead storage box viewed with main engine access panel removed. 

Here are some pics of the new galley storage box and lid.  This also includes a short movie showing how the thing works.  If anyone has an idea of how to make the lid a hinged and integral part of the box allowing for just "lifting" the lid to access the box contents, or latching the lid allowing for the complete removal of the box to access the storage underneath I would love to hear from you.

Box and lid resting on the galley counter.

Here is a pic with the box in position with the lid in the up position.

And finally here is a pic with the entire unit in place.

AND if you want to see a short movie (5 secs 120 kb) here it is.