- Download a package and extract it (since the package is contained in a sub-folder you can extract directly using "Extract here" without causing a mess)
- transfer the extracted folder into any USB storage device formatted into Fat32 filesystem
- Launch the installer with your Playstation 2 console. this is usually done via uLaunchELF (if you don´t have means to execute it, take a look at FreeDVDBoot, find a friend with access to uLaunchELF or buy a pre-installed card and install from scratch).
- Once you land into the installer menu, choose the install mode and wait untill is done. for more information regarding install modes, please take a look here
- you´re good to go, have fun!