NTFS Support is growing rapidly but i think alot of it is READ ONLY. If you have partition magic or some other program, your best bet would be to convert to fat32 and run this command in your terminal.
su (enter your password)
gedit /etc/fstab (opens text editor)
add this line to the file
/dev/hda1 /mnt/windows vfat auto,umask=0 0 0
save it . run this command
mkdir /mnt/windows
and reboot, you should now be able to read and write to your windows partition