Firmware 6.60 became the gold standard for PSP modding because:
: A massive PSP Theme GitBook featuring alphabetical lists of themes like "PlayStation 20th Anniversary" and "Pirates of the Caribbean". Popular 6.60 CTF Themes to Look For CXMB CTF Themes For PSP Infinity 6.61 - 6.60! psp ctf theme pack 660 free
Finding a safe pack is crucial. Avoid suspicious "auto-installer" executables. Instead, look for community-trusted sources: Firmware 6