the chollya repo seems to be dead for some time now - latest packages are from july 2011.
the only one still being updated i know of, is bokomoko (search the forum for instructions on how to install the repo):
http://bokomoko.de/~rd/maemo unstable/

i attach my configurations, unzip those three files into folder /home/user/.navit/
these three files are:
- navit.xml -- general navit configuration (and references the next two files)
- OSD.xml -- on screen display configuration
- maps.xml -- maps files location

you may want to change two settings:
- in navit.xml in line 9 the language attribute from en_DE to en_UK, so that navit has an english interface (en) and UK as default country (UK)
- in maps.xml the path and name of the maps file: /media/mmc1/europe.navit.bin

anything else should work -- updated navit.xml yesterday to the latest navit from bokomoko.