standard is highly recommended for better game compatibility, more stable homebrew, and easier installation of permanent hacks. The Upgrade Process
: 6.60 is widely considered the most stable firmware for plugins and Custom Themes (CTFs), often preferred over 6.61 due to better plugin support. Upgrade Path & Common Obstacles psp 352 m33 upgrade to 660 portable
: Install modern 6.60 CFW like PRO-C2 or ME-2.3 . 1. Prepare for Official 6.60 Update more stable homebrew