Location Issues

We wanted to film some of our thriller in the Fitzwilliam so we needed to get permission, to get this we emailed the museum registrar to ask her if we would be able to film in the Fitzwilliam museum. Alas she did not reply so we had to presume that we would not be allowed to film in the museum, so to over come this problem what we decided to is film the out side of the fitzwilliam and edit the rest of the film to make it seem as if we have gone inside the fitzwilliam when we are really in another location. We also had a few problem with getting some of or props like the blue prints and floor plans so we needed to create these props on the computer and make them look genuin.