After some playin around and checking how to use my eTrex H the best, i decided to make my tracklogs public (except for one which had a nice "teleport" jump of about 5 km or so :)). So there are Tracklogs of Münster and surrounding, Unna, Dortmund and the whole way between Unna and the Moehnesee (a lake near Soest).

Hope this will help accuracy of other people mappings :)