olaf@pc:~/Desktop/thinkpad/bios_nondisk$ ls
74uj12us.exe  BIOSUPTP.EXE  DOSBOOT2.COM  DOSBOOT.SYS  EFLASHAS.SYS  mnt
74UJ12US.IMG  DOBOOT.EXE    DOSBOOT.COM   DOSBOOT.VXD  IBMTPI.XML
olaf@pc:~/Desktop/thinkpad/bios_nondisk$ sudo mount -o loop 74UJ12US.IMG mnt/
olaf@pc:~/Desktop/thinkpad/bios_nondisk$ cd mnt/
olaf@pc:~/Desktop/thinkpad/bios_nondisk/mnt$ ls
$019d000.fl1  chkbmp.exe   ibmdos.com    prepare.exe  updtflsh.exe
06d6.hsh      command.com  lcreflsh.bat  prod.dat     updtmn.exe
06d6.pat      config.sys   logo.bat      qkflash.exe  userint.exe
06d8.hsh      flash2.exe   logo.scr      readme.txt   utilinfo.exe
06d8.pat      ibmbio.com   phlash16.exe  tpchks.exe
olaf@pc:~/Desktop/thinkpad/bios_nondisk/mnt$