If you have NOD32 v2 for Windows , it must be updated . Then open %ProgramFiles&\ESET\ and copy the file nod32.000 to the folder where NOD32 for DOS is extracted.
Just one more thing - NOD32 for DOS is not the preffered program/version to use - too old and unsupported . It lacks some feautures from next generation versions . Therefore it can detect and remove less than the Windows versions