0. MAKE SURE THAT HPA-SECURITY IS SET TO NORMAL (BIOS -> SECURITY -> IBM PREDESKTOP AREA -> IBM PREDESKTOP AREA -> NORMAL)
1. COPY THE FILES ON THE HARDDISK (TO A SMALL 4.5GB PARTITION, LOCATED AT THE CENTER OF THE HARDDISK)
2. BOOT YOUR COMPUTER WITH A DOS BOOTDISK
3. RUN "FWRESTOR.EXE" -> A HELP MESSAGE IS DISPLAYED
4. EXAMPLE USAGE: "FWRESTOR.EXE file=TPG40US verify"

MORE INFORMATION: https://forum.thinkpads.com/viewtopic.php?t=5846