$ sudo mount -t ntfs -o ro,utf8,umask=333 /dev/sd<x><y> /mnt/ntfs
where <x> is drive letter as [a-z], <y> is partition number as [1-4]|5|6|...
Install ntfs-3g. It can be found in sid (backports). To do that install packages fuse-utils, libfuse2, libntfs-3g, ntfs-3g (in such order). Add some thing like:
deb http://www.backports.org/debian etch-backports main
to /etc/apt/source.list to get access to backported packages and update package database:
$ apt-get update
and install throw aptitude packeges. Also you can manually download and install this packeges throw dpkg --install.
Users from fuse group can now mount NTFS volume:
$ mount -t ntfs-3g -o rw,utf8,force,gid=windir,dmask=002,fmask=113 /dev/sd<x><y> /mnt/ntfs
For help see ntfs-3g(8).