Decoding Filenames

Filenames are broken down into individual parts of the file version. Using the first file as an example:

Filename: ca663032_G4TCMD5b_KR77025147_5WY1618E_0240550251-HMC04020501144355KR77027602C.bin

ca653032 - Calibration version. 650XXX is a 2Mbit file while 653XXX is 4Mbit files.

G4TCMD5B - Intended vehicle model, year, IMMO enabled, software version
G - GK model
4 - 2002 year (3 - 2003, 4 - 2004 etc etc)
T - Region. T is UNKNOWN. N is North American
C - BETA 2.0 CVVT (0 is BETA 2.0 non-CVVT)
M - IMMO Enabled (S - IMMO Disabled)
D - UNKNOWN
5 - Software version
B - UNKNOWN

KR77025147 - Machine code version.

5WY1618E - ECM family and hardware version number.
5WY14XXX - 2Mbit family 2002-2003
5WY16XXX - 4Mbit family 2003-2008