shadow12 , it is not possible to safely "add" games, as the games are coded directly into the firmware itself. If your player is working properly, i'll suggest not doing anything to the firmware (eg updates) as it would likely brick it instead.
However, you might want to backup your firmware using S1clone v1.3, the thread is here
http://www.mympxplayer.org/new-s1clone-v13-vt8057.html