Ghost 8.0 bootable CD unable to detect CD-ROM drive letter

Hi

I have a bootable Norton Ghost 8.0 CDROM which I have been using for years
to boot up from my Dell laptops' & HP Vectra desktop's  built-in (IDE) CDROM
drives successfully which would allow me to activate Ghost to take a backup.

When I do  'attrib/s *.*'  on the CDROM drive, the only file I can see is ghost.exe
(there's no config.sys nor autoexec.bat).

However, my Thinkpad X61 do not have a built-in (IDE) CD drive, so I connect
up an external USB CD drive to it, set the BIOS of the Thinkpad to boot from
the USB CD drive first.  However, after selecting option
  "1. Boot computer with support for CDROM"  at MS Win 98 menu,
it gave a few error messages below (& did not allow me to get to a
CD drive for me to invoke ghost.exe) :
 
No Drives found, aborting installation

Device drive not found
DetectCD was unable to determine the CD-ROM drive letter

& it went down to A: drive which contains several MSDOS
executables/binaries, eg:
  fdisk.exe, format.exe, doskey.exe, attrib.exe, chkdsk.exe,
  detree.exe, edit.com, mouse.com

I've tried to go to C or D drive (type  C: or D:) but it gave "Invalid drive
specification".  B drive contains the MSDOS same binaries/executables.
When I booted up my brother-in-law's Compaq desktop PC, we faced
the same problem too.

There's an autoexec.bat file in the A: or B: drive & its content follows :
@echo off
mouse.com
path=a:\;%CDROM%:\
cls
IF "%CONFIG%"=="NOCD" GOTO LQUIT
LH MSCDEX.EXE /D:cdrom001 /L:%CDROM%
set CDROM=FOO23
DETECTCD.EXE
IF "%CDROM%"=="FOO23" GOTO NOCDROM
%CDROM%
cls
IF "%config%"=="SUCD" GOTO LQUIT
ghost.bat
GOTO LQUIT
:NOCDROM
cls
echo.
echo DetectCD was unable to determine the CD-ROM drive letter.
echo.
:LQUIT
set CDROM=


The config.sys last few lines (can't catch a glimpse of initial few
lines as they scroll though very fast). Can anyone help?



... (can't see the first few lines)
[GHOST]
device=himem.sys /testmem:off
device=oakcdrom.sys /D:cdrom001
device=btdosm.sys
device=flashpt.sys
device=btcdrom.sys /D:cdrom001
device=aspi2dos.sys
device=aspi8dos.sys
device=aspi4dos.sys
device=aspi8u2.sys
device=aspi2dos.sys
device=aspicd.sys /D:cdrom001

[COMMON]
files=60
buffers=20
dos=high,umb
stacks=9,256
lastdrive=z
device=display.sys con=(ega,,1)
country=001.437,country.sys
install=mode.com con cp prepare=((437 ega.cpi)
install=mode.com con cp select=437
install=keyb.com us,,keyboard.sys


Kindly give me your enlightenment