Gameboot.PMF on SLIM 3.60 M33 Not customizable?

[DrEggman]

Tried giving my 3.60 M33 slim a custom gameboot.pmf that I've had working on 1.5-3.52. My regular app doesn't run since it requires 1.5 homebrew support so I booted the recovery menu. I then toggled Flash0 USB and replaced the gameboot.pmf manually. Now when I start a game, it shows a white screen with the PSP logo, but no sound or animation. I double checked the file size to make sure it replaced correctly.

[double_x]

I've read anywhere that Sony puts a security protection on flash0 you can't flash anything but you can make it with cxmb :D:D:D go to pspupdates.com and read it there

Here is the link:

http://pspupdates.qj.net/Custom-themes-applied-on-CFW-3-60-M33/pg/49/aid/102343

[bobska82]

... which was copied from maxconsole!
you have to use cxmb as described here:
http://forums.maxconsole.net/showthread.php?t=78885