request for reinstall fsx scenery

Does anyone know if I can delete certain areas / or reinstall certain areas of basic fax sceneryI have corruption in a particular area. Can I reinstall fax base airports?Are the files available to install in this manner and who understands how to do it if in fact it can be done.,I tried to repair from the original fax deluxe and accel disks but that did not go very wellI know there is someone here that must have some idea on this topicThanks in advancePeter