Your PS3 can be configured with either CFW or HEN and will depend on the model of PS3 that you are in possession of. For the most part the two are used exactly the same. HEN must be re-enabled every time the PS3 is turned back on. If you do not see a HEN button on the XMB (Cross media bar, aka the home menu) then you have CFW. You can further confirm you have CFW by confirming the text “Evilnat” appears on screen during bootup.
Games can be added by copying the files over FTP to the console, or by downloading from PKGI, which downloads the games directly from PSN.
PKGi is a package downloader which allows you to download games directly from PSN, on the PS3 console. While this is convenient, it does have limitations:
Usage is simple.