Step 1: after download the file above, plug in your USB for your PS3 and copy IrisMAN to the root of the USB.
Step 2: Plug your USB into your PS3 running CFW and scroll over to Package manager. If you do not have Package manager run MultiMAN and que it from your settings.
Step 3: Install the package and run the Homebrew from the XMB. Select the generic path and your done.