I would like to add information to openstreetmap (routes,POI) but in a local version not to the version that is deployed on the web. So how can I do that ?
How do wish to use them : If you just want the data: You can download osm-data in a number of formats (shp, glm, file geodatabase) from http://market.weogeo.com/ . You edit those. QGIS also has a plugin that allows you to edit OSM-data. Merkaartor ( http://merkaartor.be ) is dedicated desktop app that allows you to edit osm-data locally and export it if you want. With maperitive.net ( http://maperitive.net ) you can load, modify, export osm-data to svg of images.