How can I copy files from a hard drive formatted to NTFS, to a FAT32 hard drive ?

You probably asking about Windows NT that does not support FAT32.

There are third party FAT32 drivers for NTFS, or you can use FREE NTFS Reader to copy files in DOS environment. Just make sure that your DOS supports FAT32. You can use Bootable Floppy Creator to prepare such a floppy containing DOS and NTFS Reader for DOS.