After reading from the Gigolo Help (http://www.uvena.de/gigolo/help.html), trying to install the gnome-mount wrapper script for exo-mount, trying gnome-mount utility with
apt-get, trying to update my ~/.local/share/applications/defaults.list, trying to add my user account to the fuse group, and trying various combinations of the above elements, I finally found something that worked.
I installed and ran ntfs-config. On my Xubuntu 9.10 installation, I achieved this with the following commands:
$ sudo apt-get install ntfs-config
$ gksudo ntfs-config
So far, it is working. I'm not sure what ntfs-config does, but unfortunately I don't have the time right now to find out. I would welcome additional info about the utility.