I want use N900 GPS positioning/tracking/navigating features on terrain with my custom maps.

In the past I created a lot of tracks and points of interest with Ozi Explorer (http://www.oziexplorer.com/). I uploaded tracks to my old Magellan 320, and a have navigation on terrain. Then I downloaded actual way from GPS to Ozi Explorer and I have nice repository of my activities.

I found eCoach for N900, but it lacks custom maps and tracks uploading, isn't it.

Which application supports this functions?

Regards,
Sašo Celarc