The PCMCIA drive should have come with the DOS Setup disk that you require. What is the manufacturer of the CD-ROM?
It may not work since it's specificly for their CD-ROM but heyQ: CD-ROM Device How to drive PCMCIA CD-ROM Drive under pure MS-DOS mode?
A : There are two ways to solve it.
1.Preparing a boot disk, then editing the CONFIG.SYS and AUTOEXEC.BAT on the disk..
_______ EDIT CONFIG.SYS:
_______ DEVICE=A:\HIMEM.SYS/TEST:OFF
_______ DEVICE=A:\ARICDI.EXE/P:3 /I:9 /D:MSCD001
(The file ARICDI.EXE can be copied from the original driver disk bundled with the CD-ROM's package. The argument I:9 means IRQ:9. It can be 9,10,11,15) _
______ EDIT AUTOEXEC.BAT: _
_______A:\MSCDEX.EXE /D:MSCD001 /L_
(The file MSCDEX.EXE is provided by Microsoft. It can be copied from MS-DOS or MS-Windows series.)_
2.Or downloading the file: bootdisk.exe _
Preparing an empty floppy disk, then double click on the file downloaded in hard disk drive. It will unzip automatically to the disk. At last, restarting computer from the disk.