GeoPoi application is able to add pois into an existing Maemo Mapper database. Geopoi and its command line version called gpxtractor can read .loc, .gpx and .csv files. Gpxtractor is distributed with...
Yes, it should work on N800. I have used it on N800 with OS2007 and OS2008.
It is dependent on Python packages. You could try to install first Python and then geoPoi. Knowing the exact error message...
There is a new version (0.2.3) of geoPoi available. It can read .loc files in addition to .gpx pocket query files. There are also some other minor improvements.
Geocachers might be interested to try geoPoi software which I have uploaded to garage.maemo.org. Using it you can convert Pocket Queries received by email into a Poi database format used by Maemo...
I'm satiesfied with this http://www.shieldzone.com/item_description/NOKN800.html
In FInland, you can order one from geocaching shop http://www.kivenalla.fi
Here is one way to maintain up-to-date cache databases in Maemo Mapper.
You need to have a Linux computer with the following software/utilities installed:
gpsbabel, sed and sqlite3. Internet Tablet...
Just download the Mozilla based browser and installation instructions from here (http://browser.garage.maemo.org/)
It helped me. You may also try to disable java script from Opera.