If you are on any version above 2.0.2 use HFW tools to update (ONLY ENABLING HEN NEEDED). If you have never installed HEN before, use auto installer (NO HAN INSTALLATION NEEDED). If you want to install the PKG manually using USB and things simply mount dev_rewrite as flash and install the PKG!
i tried this on first run, updating from v2.1.1 and nothing happens really, it still uses v2.1.1 for some reason.
so updating to 2.2.1 needs to download the pkg file, activate the HAN+Flash mounter (now located under developers menu, I dont know why...) and install the HEN v2.2.1 HEN pkg, after reboot its v2.2.1 with obvious changes at boot (instead of PS3 logo its now a golden egg with HEN work on it).

