Is it NTFS or FAT? Did you try editing/moving/deleting as root?
If you can do it as root, then edit /etc/fstab and add "users" to the options of the partition.
I don't know if that works with NTFS though...
As an alternative, I would suggest moving your shared files (between Linux and Windows) onto a partition formatted with FAT32 if you are running NTFS (the default format for WindowsXP).
[EDIT: Added alternative suggestion]
Last edited by yubimusubi; 09-10-2005 at 08:06 PM.