Why was there such a demand for "6.60" specific packs?
Unlike a simple PTF theme (which only changes the background, icons, and font colors), a (Custom Theme File) uses a CXMB plugin (custom_xmb.prx) to load an entire rewritten vsh/resource/ folder structure from the memory stick. This means:
Each CTF is essentially a : system_plugin_bg.rco (background control), impose.rco (battery/time display), opening_plugin.rco (boot animation), game_plugin.prx (game menu icons), etc.
Avoid "theme pack generators" that require you to input your credit card info. Legitimate CTF packs are always free.
: Supports animated elements like moving clouds, walking characters, and custom "coldboot" (startup) animations.