Hi David,
I believe you can mount ntfs read / write with Knoppix 4.x, but it is a bit more involved.
I originally posted about this topic to http://www.knoppix.net/forum/viewtopic.php?t=21373, but it seems to keep cropping up.
Regards,
Mark

The /dvd/KNOPPIX/linux-ntfs directory of Knoppix 4 (Linux Magazine November 2005 cover edition) shows state as far as writing to ntfs partitions. This uses libntfs. (The Open-Source linux-ntfs library not the kernel driver, which is derived from it). The kernel module is usually about 6 months behind libntfs. According to the article by Klaus Knopper you can now delete files and directories, and create up to 9 new files or subdirectories within a directory. It is complicated to recompile every program to use libntfs for write operations, so they use the FUSE kernel module and a utility called ntfs-mount to actually mount the NTFS partition.
Hopefully the above background information will help when reading the SNAPSHOT information for developers.
Regards,
Mark