Usage of 3.52M33 not differently than use DAX CF's (Dark Alex's Custom Firmware's).
After formating a memory stick under 3.52M33, there some
new folders appears on your memory stick:
ms0:/ISO - put *.iso, *.cso files with game images there.
ms0:/PSP/GAME150 - put home-brew programs that need 1.50 kernel there.
alsoknown folders:
ms0:/PSP/GAME - put there official game DEMO's, subfolders with PSX (PSOne) EBOOT.PBP (to play PSX games on your psp).
ms0:/VIDEO - for MP4 video files.
p.s. There is a forum tread with basic
3.52M33 FAQ, but it alsow on
russian.
p.p.s. There is a 'recovery menu' that have a basic CF settings, some of them need to be changed, examply to play ISO's games:
Configuration -> UMD Mode - set value 'M33 -NO UMD-' or '-Sony NP9660 -NO UMD-'
Advanced -> Advanced configuration -> -- set all subsettings ('Plain modules...', 'Execute BOOT.BIN...', 'Use isofs driver...') to DISABLED.
To enter in 'recovery menu' hold "R" button before turning on your psp, after it appers - release "R" button.
I don't recommend "to play" with recovery menu options, also you don't know why there are.