This article explains you, how to install PortableApps.Com Software:

Go to PortableApps.com and choose the version of software depending on the size of your portable device.Press Double click on the executable file and start the installation process. Save your software setup file in your desired destination folder inside the PC. When you are done with downloading process , open and run this setup. Click on “I Agree” and accept all terms and conditions to start this application.