If you generate your own datafiles, extract only the files you want replaced.

cklist.dat - Pack Rat bands.
ck2list.dat - Calls w/operator names.
logsort.dat - Good Calls file.
ratslist.txt - Printable Pack Rat bands list.
vhf4k.adi - 5000+ callsign ADIF (created by K9PW - updated by W3KM.
Note: This datafile is updated from PackRat logs, so updates from other
      parts of the country will not appear. Make your own datafile or
      update it using my Cab2ADIF Updater software. You can use your own
      ADIF and select it in VHFLOG and KM Rover. This file must be in the
      same format as vhf4k.adi however.

VHFLOG or KM Rover users living in the NE part of the country are welcome
to use my datafiles. Extract the files you want to the c:\vhflog32 or
c:\kmrover32 folder. To see the changes, run the logger after updating.