This worked for me. I am now running maemo-mapper 2.3 on my 770 with 2007he. The one thing I found was that libgps16 has been replaced with libgps17 so the above download link does not work anymore. I had to find the updated package on the site. I downloaded it from here http://packages.debian.org/sid/armel/libgps17/download I used one of the ftp links because firefox just opened the file in a browser window when I clicked the www USA links.