It is probably NOT on the HCL.

Management of Removeable Storage has been moved to RSM in Windows 2000.

Right click on MY Computer and press Manage. Double-click Removeable Storage / Medial Pools / Import / CD-ROM. You should be able to expand Physical Locations to also see the slots so you can mount and dismount and given disc.

Here is a Mount.bat batch file you can modify to mount changer discs:

 
@echo OFF

rem - Extract the friendly name of your changer using: rsm view /tchanger
rem - then replace the string following the /cf with the string returned.
rem example:
rem rsm view /tchanger
rem CHANGER
rem NEC CD-ROM DRIVE:253
rem The command completed successfully.
if "%1"
"" GOTO USAGE
if "%1"
"/?" GOTO USAGE
if "%1"
"1" GOTO SLOT1
if "%1"
"2" GOTO SLOT2
if "%1"
"3" GOTO SLOT3
if "%1"
"4" GOTO SLOT4
if "%1"=="e" GOTO EJECT
GOTO USAGE
:SLOT1
rsm mount /sf"Slot 1" /cf"NEC CD-ROM DRIVE:253" /oread
if %ERRORLEVEL% equ 536870916 GOTO MOUNTED
@echo %ERRORLEVEL%
GOTO END
:SLOT2
rsm mount /sf"Slot 2" /cf"NEC CD-ROM DRIVE:253" /oread
if %ERRORLEVEL% equ 536870916 GOTO MOUNTED
@echo %ERRORLEVEL%
GOTO END
:SLOT3
rsm mount /sf"Slot 3" /cf"NEC CD-ROM DRIVE:253" /oread
if %ERRORLEVEL% equ 536870916 GOTO MOUNTED
@echo %ERRORLEVEL%
GOTO END
:SLOT4
rsm.exe mount /sf"Slot 4" /cf"NEC CD-ROM DRIVE:253" /oread
if %ERRORLEVEL% equ 536870916 GOTO MOUNTED
@echo %ERRORLEVEL%
GOTO END
:MOUNTED
@echo .
@echo REASON: MEDIA ALREADY MOUNTED, OR NO MEDIA IN SLOT
GOTO END
:USAGE
@echo .
@echo To mount media, enter slot number between 1 and 4
@echo e.g. Mount 1
@echo .
@echo To eject current slot enter Mount E
GOTO END
:EJECT
net stop ntmssvc
start /wait rsm ejectatapi /n0
@echo %ERRORLEVEL%
net start ntmssvc
:END

NOTE: See Q231814 Removable Storage Manager May Not Eject Media for Some Devices.