you'll have to give your normal users access by editing the ::
you'll have to add umask=000
where xxx is the user id of a specific user, to the options in your fstab...for example...
/dev/hda1 /mnt/win vfat user,rw,noexec,umask=000 0 0
/dev/hda1 /mnt/win vfat user,rw,noexec,uid=500 0 0
where 500 will be the specific user id for a user...
i see your using winxp, so if you have set it up with a NTFS partition, then you will have to leave it as read-only unless you want to risk data corruption....IT IS STRONGLY ADVISED that you not enable write access
so unless you are using a FAT fs on your drive, do not enable this..