When choosing a projection in MapInfo, there is a large list of available coordinate systems. Where is the file that stores these and is it easily editable?
MapInfo uses a file called MAPINFOW.PRJ to store all its projections. It IS easily editable. Search under program files MapInfo/Professional (from memory) for this file. It's not encrypted or subject to any security, so there's no withcraft needed to make changes.
Hope that helps.