Trying to figure out epsg for a GeoTIFF

[Dennis Megarry]

I'm going to sound like as complete newbie be assking this (which I am
really).

I have a GeoTIFF raster image and I'm not sure how to setup the projection
in my map file.  Can someone take a look at the below info from gdalinfo
and tell me what I need to do?  If at all possible, some details so I can
learn a bit?

Driver: GTiff/GeoTIFF
Size is 11873, 8123
Coordinate System is:
PROJCS["unnamed",
    GEOGCS["NAD83",
        DATUM["North_American_Datum_1983",
            SPHEROID["GRS 1980",6378137,298.2572221010042,
                AUTHORITY["EPSG","7019"]],
            AUTHORITY["EPSG","6269"]],
        PRIMEM["Greenwich",0],
        UNIT["degree (supplier to define
representation)",0.01745329251994328],
        AUTHORITY["EPSG","4269"]],
    PROJECTION["Lambert_Conformal_Conic_2SP"],
    PARAMETER["standard_parallel_1",38.6666666666667],
    PARAMETER["standard_parallel_2",33.33333333333337],
    PARAMETER["latitude_of_origin",0],
    PARAMETER["central_meridian",-81.45000000000009],
    PARAMETER["false_easting",0],
    PARAMETER["false_northing",0],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]]]
Origin = (-439988.052575,241474.587546)
Pixel Size = (63.88386800,-63.88386800)
Metadata:
  AREA_OR_POINT=Area
Corner Coordinates:
Upper Left  ( -439988.053,  241474.588) ( 84d48'17.02"W,  1d46'42.74"N)
Lower Left  ( -439988.053, -277454.072) ( 84d40'25.94"W,  2d 7'20.21"S)
Upper Right (  318505.112,  241474.588) ( 79d 1'15.86"W,  1d48'22.30"N)
Lower Right (  318505.112, -277454.072) ( 79d 6'57.06"W,  2d 5'48.28"S)
Center      (  -60741.470,  -17989.742) ( 81d54'14.71"W,  0d 8'11.59"S)
Band 1 Block=11873x1 Type=Byte, ColorInterp=Palette