I found this trick on Libranet's web site in their support database:
http://www.libranet.com/support/view...item=0155.html

Here is a line from my /etc/fstab file:

/dev/hde1 /win vfat defaults,exec,gid=windows,umask=002 0 0

above is the line from my /etc/fstab file for my windows partition. Note; I still get permission errors and files cannot be moved from my windows partition to my linux partitions, they are copied fine, but the old file cannot be deleted, so I have to copy and delete, but users can write to the partition.

So, what you do is edit your /etc/fstab, if you only have one user on your system ex: user knoppix then you should be able to use: gid=knoppix (if that is the group user knoppix is in) instead of windows, unmount the partition, mount it and everything should be OK. If you have multiple users, then add a group such as: windows and make all users part of group windows.

If you want a gui user/group frontend try kuser it's simple and easy to use.

HTH

~rock