you could alter the permissions in /etc/fstab to allow users to mount disks or set special permissions, for a windows partition this is what I have set
/dev/hdb1 /mnt/mydocs vfat rw,user,noauto 0 0
This allows users to mount the disk, so they get write permissions. ( change /dev and /mnt to whatever you have ).
You can also set guid and others ( see man fstab ).