Dark_Alex has just released the newest version of his Custom Firmware SE-B Revision C. The Biggest change appears to be "NO UMD Mode" Fixes and compatibility with the VCS UMD and not having to use the "Bait and Switch"l Method

Changelog:

Added SFO version bypass to real umd's. (this should enable gta vcs umd to be played.)
Fixed the problem of error 0x8002012D in certain games when plain modules is enabled. Because the problem is gone, the updater will reset the option of plain modules to enabled. If for some reason you still have that error, report it and disable the option, but it should be fixed now.
Found and corrected 3 bugs regarding no umd.
- One of them affected Virtual Tennis and potentially a lot of other games.
- The other two affected GTA LCS and GTA VCS.
- Some games like Burnout Legend still don't run in no-umd because of what seems a kernel stack problem

I would try it, but I dont have a spare UMD at the moment, and VCS is in sleep mode. If I break for home to update and it doesnt directly load VCS, I wont be able to play it till tonight.

I'm confused... If my memory computes, those are the same features as SE-B RB... Is that supposed to be SE-B" or SE-B'''? I am sooooo confused...