Ah, on a PC now...
By default. CONFIG.SYS does not have a PATH command (unless you're using OS/2) so you will have to use the full pathname of the device driver, for example
C:\DOS\EMM386.EXE
C:\DOS\NOSMOKE.EXE
C:\DOS\HIMEM.SYS
The PATH= command resides within the AUTOEXEC.BAT file, and this tells DOS in which directories to look for files if it is not present in the root
So, for example, you will have (when doing a DIR)
C:\DOS
C:\MENU
C:\MYPROG
C:\ACAD
and the PATH then will be
PATH=C:\DOS;C:\MENU
Thus DOS knows it will need to look into the DOS and MENU directories if any program is called, before returning with a Bad Command or File Name error.
But I digress
When networking with DOS, the LASTDRIVE=Z: need to be added to the CONFIG.SYS file (usually the last entry) before the NDIS (or network) drivers
Any chance of getting the contents of the original CONFIG.SYS and AUTOEXEC.BAT off from the original hard drive, even if it means slaving that drive into the CNC PC?