First, do you have any other scenery made by FsDreamTeam or Cloud9 or Skymakers installed ? If yes, this might be an install problem with one of the others, that can usually be fixed by installing the Stand-alone Addon Manager, found on the O'Hare product page, after installing O'Hare.
Also, a reason for a QUIT (not "crash") to desktop, might be a old version of the Esellerate library in your Windows folder (BTW, you should tell us more about your system, it's not possible to help you without knowing *anything* about your machine, and OS)
If not, check the installer is successfully downloading some files as soon as it runs. If you have a firewall, you need to grant online access to the setup program, otherwise it might not be able to complete its installation.
If even this doesn't help, check your antivirus, and try disabling the fs9\modules folder from scanning.
If still doens't work, then it must be a conflict with another module you installed that we don't know of, so it might be useful to know what's inside your modules folder.