You can do a forced mount using ntfs-3g on ntfs partitions.
something like this i think:
Where hda2 is your desired harddisk/partition, so you put sdaX or hdaX..Code:~ maxe # mount /dev/hda2 -f ntfs-3g
(where X defines the number aka partition it is you want to mount.)
sda = S-ATA
hda = ATA
For USB drives, the KDE environment should be able to mount them automatic.
If not you should try mount it using vfat seeing as that was the best option that worked for me.
If you need more information about the mount command write:
Code:~ maxe # man mount