As you know Knoppix is a Linux distribution based on the 2.4.x kernal.

2.4.x by default has poor NTFS read and minimal, but DANGEROUS write support. 2.5 and 2.6 has a newer NTFS driver that has much much better NTFS read support. It also only supports writing if the file size stays the same.

If you or anyone can help with NTFS support the Linux NTFS site is here:
http://linux-ntfs.sourceforge.net/index.html