Igo is primarily oriented to navigating on a roads. Not a problem to the software itself, as to the fact that there is no interest to move off the road.
Only Gramin of commercial solutions has specialized devices for that purpose.
Is your unit WinCE or Android based (or something third...)? There are some solutions that are based on Russian topographic maps, and work under Android, I do not know whether they have for WinCE.