In Mappoint the legend only appears with the overview. Can I put the legend onto the maximised map ?

There is no obvious way to do this. Our own workaround for this is to use the Save as Web Page feature to export the map and legend, and then highlight and copy the legend and map from the HTML file. If you copy and paste the legend and map separately, you can then paste them into Word or PowerPoint and position the legend on top of the map. This may take a little getting used to, but the end result is probably what you were looking for.