Installing SUDAAN is fairly straight forward. You can download the installation files from http://www.rti.org/sudaan/page.cfm/Downloads . You can accept most of the default settings. You will need to know which version of SAS you are running (version 8 or 9), as well as if you are running SAS 32-bit or SAS 64-bit. You will also need to know where the SAS configuration file is located. If there are patches for the version of SUDAAN that you are using, they will also be listed at http://www.rti.org/sudaan/page.cfm/Downloads . Please see Updating SAS-Callable SUDAAN for Windows for more information.