If I want to access my c: drive on my Windows XP computer from my FC2 computer I just type:
mount -t smbfs -o username=name //10.0.0.3/c$ /mnt/win
and umount /mnt/win to dismount, like the net use and net use /d in Windows.
c$ is an administrative share on all WinNT boxes that only administrators can access, so be sure the Windows-user you use is an administrator on the Windows-computer. Eventually create a new share and grant access to your Windows-user.
For me that worked right out of the box!
This is if you try to access an NTFS-disk on another computer. I dont know how to do this if it is a NTFS-partition on your Linux-computer.