WHERE TO - [Down Arrow] - CO-ORDS
Change the format of the co-ords... I know British national grid is in there along with a variety of foreign ones... and also international standards....
Lat and Lon is very easy to put in, on the 'where to' screen go to the bottom and select coordinates. If your after putting in grid references then on just select 'Ord Srvy GB' the change the format to 'British National Grid'
that sounds the same as the 2610 , the only problem with using the POI is that you dont have a accurate destination , you d have to keep readjusting the map the nearer you get to the destination. Iwould have thought with this day and age techno they would have made it possible to enter grid ref. the same as post codes.