Team M33's custom firmware 3.51 M33 has gotten another new update. According to the readme file, the use noumd config in recovery has now been changed to UMD Mode.

With this update, PlayStation Portable users get three choices. They can run a game normally using a UMD or go for the custom firmware's two UMD-less modes.

For installation instructions, please read the readme.en file included in the download. You can also check out this How-To article on installing custom firmware 3.51 M33.