All depends on what year it is. Workshop manuals for 2002-2005 and 2007-2010 are downloadable with links in the FAQ stickie above. The piece pictured is not a speaker cover though. It's called something along the lines of a load space cover support or load space upper trim...
The Rave Manual has instructions on how to remove it. From what I remember, when I did interior work two years ago, it was pain in the neck to remove, and not that intuitive to do without instructions.
Re: RAVE manual - I downloaded it and unpacked it but it appears to be a CD menu. Even with the latest version of Adobe Acrobat installed on my PC, it just seems to be a series on unrelated images, spread across a dozen or so folders. How is is supposed to work? Why not just one large PDF?
Did you follow the ONE direction in the FAQ stickie above? Yes it is a CD menu, there is no install there is only one thing to click. That opens an interactive menu, choose "New Range Rover" and the files are indexed and selectable.
"Click rave-lr.pdf once downloaded and you are set to go on any computer. In other words IT RUNS ON ANY COMPUTER WITH ACROBAT READER."
Mine rattles too, and is loose, but I was thinking instead of replacing, I was going to go get some really thick rubber washers or grommets, and put those between the screws at each end. This way, I was thinking the rubber grommets would act as vibration protection and I wouldn't hear the rattle over bumps.