Default NAME Scenery Help

While I am developing several LOD 5 scenery areas, I find the BRNAME0.BGL covers about 40 degrees N-S X 30 degrees W-E. This is much more than I would want to tackle. All Default bridges are nor collapsed due to change to 38 meter mesh files and looks rather DUMB! I wonder why all files are not of the same LOD and if the BR* files can be changed to cover LOD 5? Any hjelp would be greatly appreciated!Richard L Hill