Is it possible to make your own monopoly online game.?

I want to create my own customised version of monopoly but as a computer game a google search keeps giving me results for creating your 'own board' I just want a virtual monopoly game that I can create to suit me %26amp; my friends any ideas? Thank....|||well, unfortunately to even put the little virtual train you have to take a long time discussing with monoply manefacturers and making copyright agreements with the makers because it dosent nessecarily belong to you does it?