I have a shp file with EPSG Projection 31256 - MGI / Austria GK East. However, the EPSG code states a false easting value of 0, while my prj file contains 750000 (that's probably also the reason why ArcGIS doesn't suggest any transformation parameters and thus won't reproject my shp file?). How can I define my false easting value when I want to re-project my shape file from epsg:31256 to WGS84 (e.g. epsg:32633)? Do I miss something?