How to copy files from A computer of NT System to The other one of Unix system?

Tell Me A Software that works.

smbclient or smbmount
will do the work

Samba can do it, set it up in RH with SWAT.
Or if the hard drive is on the same machine as Linux then recompile the kernel with NTFS support and use mount -v ntfs /dev/hd?? /mnt/??

Please, beware:

NTFS support under linux is not the most stable thing.
By the way, NT can work with FAT fs. Which is your case?
In case you are luckily using FAT, and if the hard drive is on the same machine as Linux, compile VFAT & MSDOS file-system support into the kernel, but try to avoid NTFS.

And what about FTP, or SCP (SSH) ?

If you have just a few files to copy - it may be quicker to download PuTTY / PSCP on the NT box.

http://www.chiark.greenend.org.uk/~s.../download.html

PSCP is essentially a Windows version of the 'scp' command in *nix.

One you have PSCP downloaded, just go to a DOS prompt & use the command:

pscp file-to-copy.txt user@unix.system.net:/home/whatever/file/

You will be asked for the password for the unix machine's folder you are trying to copy to & you're done! ( of course, you must have permission / privilege to write files in that folder )

FYI - I believe you must be at the DOS prompt in the folder where PSCP resides...

What ever happened to good old ftp?