I think you need to copy the folder called "Pilots" in the folder called "Resources"
nope, tried it. all that is there is a 5byte file with the text saying "Done." both on my progressed copy and my non-progressed one
EDIT:
I think I found it.
C:\Users\
Username\AppData\Local\VirtualStore\Program Files (x86)\mektek.net\Mechwarrior Mercenaries - Mektek Mekpak\RESOURCE\Pilots
Note: I am running 64 bit, so
Program Files (x86) may be
Program Files for those on 32 bit.
open pilots, and my username is there. its around 10 megs the file, includes the maps I did.
EDIT 2:!!!! I copied the folder from Mechwarrior Mercenaries - Mektek Mekpak in the directory to the end,
Everything is there! settings, mechs, campaign. EVERYTHING. feel free to put this in the OP if you would like