Under the subdir DISKS are the installation files for your application. The installer is SETUP.EXE. If you asked for diskettes size files you should also find DATA.nnn numbered files. Put all these file on a CD-ROM. For Diskettes, put SETUP.EXE and DATA.001 on the first diskette and each other on its own diskette. Under APP directory, you will find the application files and directory as they will be installed by the Installer (except for INSTALLER subdir). You can check there if all the files have been included.
To install your application, start SETUP.EXE from the CD-ROM. The installation process will prompt the user for an installation directory. The default directory provided for installation is the one you set in the installer settings.