I was just browing PSPGen, and found this. I don't know who the author is, it only says it's PSPGen exclusive.
Installed it and works fine :) Please refer to here for screenshots and such.Originally Posted by PSPGen
I like the in-XMB recovery, alot :)
NOTE: It doesn't change the version, so it will say offical "Version 3.93", however, all custom firmware features will work.
Reupload on MegaUpload
Offical 3.93 Sony update
EDIT: 1.50 kernel add-on released. Get it here.