I'm about to start a 1 to 3 year project in creating, and perfecting a custom firmware for psp titled 6.00 M33-Blazin' Edition. Hopefully It will include all these things...
All features of psp official updates to 6.20
Support for games of 5.50 and higher
Vsh menu or an intergrated Ultimate Vsh menu
CXMB for 5.50 or a new CXMB for 6.00
Homebrew and UMD Backup support
And the rest is up to you. give me ideas and help me in my quest to make the new M33. Dark Alex may be gone but his firmware will still live on!
All credit and props go to the original creator of M33 firmware, DARK ALEX