Dark AleX has released a new updated version of the Despertar del Cementerio universal unbricker. This particular unbricker works for both the Slim and Fat models of Sony's PlayStation Portable handheld video game console.

According to Dark AleX, this new update is mainly to support the PSP Slim's screen in the mixed 1.50/3.40 kernel used during recovery. This is also a pretty big step towards 1.50 kernel support in the PSP Slim since the main problem - the screen - is now fixed. Here's a full changelog:

    * Coded a display driver that supports the psp slim screen in the mixed 1.50/3.40 kernel.
    * The M33 installation will install 3.71 M33-2, not 3.71 M33

For easy 3.71 M33 installer:
Psp hack

1.50 Kernel addon for slim is still under development by M33 (Dark_Alex)

I dont think 1.50 kernel is for normal iso/cso and eboot, all of em is played using 3.71 kernel. (check using the R button+ power, Recovery mode). 1.50 is for homebrew and ol'school hybrids.