move them and their 89 companions to their own folder
open the scenery folder, on the tool bar at the top select view list.
In the list find
476112A16N.bgl
click it to highlight the file
scroll down the list till you find
512116A16N.bgl
press and hold shift while clicking on it
you should now have the two files selected all the files between.
are they all ******A16N.bgl ?
if not press Ctrl and click those which are not to deselect them
You should have 91 files selected. Right click, select cut.
right click empty space some place* to create a new folder, open it , now paste those 91 ??????A16N.bgl s into the new folder.
*(vista and win7 use desktop else just make the new folder inside the scenery folder to start with)
Delete the filelist.dat from the scenery folder.
Move the newly created folder to scenedb
create another new folder in there, name it PacFlattens. put the folder containing the offenders into that. follow it in and rename it scenery.
Now you can start the sim, start a free flight from the base, see any change?
Now you may find some other place in the sim were you see an ugly hill of water, if you do you can just use the scenery library to reactivate the flattens.