Looking for definitions of cfg settings

Can someone expain how the following affect FS9?{graphics}performance_mode_=0def_perf_mode=6lod_target_fps=14auto_lod=0texture_max_load=1024Is the TextureMaxLoad=10 in {display} different? If so, how?Does this cfg section look OK?UPPER_FRAMERATE_LIMIT=20TEXTURE_BANDWIDTH_MULT=400TextureMaxLoad=10RUNWAY_LIGHTS_SURFACE_SCALAR=.9RUNWAY_LIGHTS_VASI_SCALAR=.6RUNWAY_LIGHTS_APPROACH_SCALAR=.9RUNWAY_LIGHTS_STROBE_SCALAR=.9TERRAIN_ERROR_FACTOR=100.000000TERRAIN_MIN_DEM_AREA=10.000000TERRAIN_MAX_DEM_AREA=100.000000TERRAIN_MAX_VERTEX_LEVEL=21TERRAIN_TEXTURE_SIZE_EXP=8TERRAIN_AUTOGEN_DENSITY=5TERRAIN_USE_GRADIENT_MAP=1TERRAIN_EXTENDED_TEXTURES=1TERRAIN_DEFAULT_RADIUS=9.0TERRAIN_EXTENDED_RADIUS=9.0TERRAIN_EXTENDED_LEVELS=4I'm trying to get sharper images farther than 2-3 miles from the aircraft.Thanks, Michael