TO DO full description, in the meantime, if you know what this is about, you'll probably be able to work it out.
The parameter files are found in <installdir>\MobiComp\Geo under Windows or <installdir>/MobiComp/Go under Linux.
ellipsoid.txt Ellipsiod parameters.
#name code semi-major axis inverse flattening
Airy 1830 7001 6377563.396 299.3249646
Airy Modified 1849 7002 6377340.189 299.3249646
International 1924 7022 6378388 297
WGS 84 7030 6378137 298.257223563
datum.txt Geodetic Datum parameters
#name code description ellipsoid prime meridian dx dy dz geoid separation
ED50 6230 European Datum 1950 7022 0 -87 -98 -121 85
OSGB 6277 OSGB 1936 7001 0 375 -111 431 38
OSIRL 6299 TM65 7002 0 506 -122 611 7
WGS 84 6326 World Geodetic System 1984 7030 0 0 0 0 0
Rome 1940 6806 Monte Mario (Rome) 7022 0.217334217 -225 -65 9 1
srs.txt Spatial Reference System parameters
#Name code type unit datum lat0(r) lon0(r) nZones zAmp(r) e0 n0N n0S f0 description
ED50 4230 G d 6230
OSGB 1936 4277 G d 6277
TM65 4299 G d 6299
WGS 84 4326 G d 6326
Monte Mario 4806 G d 6806
UTM/ED50 230xx TM m 6230 0 0.052359878 60 0.104719756 500000 0 10000000 0.9996 UTM, ED50 (zones 28N-38N)
UTM/WGS84 326xx TM m 6326 0 0.052359878 60 0.104719756 500000 0 10000000 0.9996 UTM, WGS84
BNG 27700 TM m 6277 0.855211357 -0.034906586 1 0 400000 -100000 0 0.9996012717 UK national projection
Irish NG 29900 TM m 6299 0.93375115 -0.139626340 1 0 200000 -250000 0 1.000035 Irish national projection
Italy(W) 26591 TM m 6806 0 0.157079633 1 0 1500000 0 0 0.9996 Italian national, West zone
Italy(E) 26592 TM m 6806 0 0.261799388 1 0 2520000 0 0 0.9996 Italian national, East zone