Wlan fix is now done differently, patch is done in 3.51 kernel before going to 1.50 one.
For those that don't read the readme file: we never would include in our files a sony prx! The fix was and is done simply with code. The 3.40 mention was to notice that the problem It was not a M33 bug, but a problem caused by Sony.
4th level of brightness enabled on 1.5 kernel too now.
An option has been added to recovery, "Hard Reset on 1.50 homebrew." Use this, only if the wifi fix doesn't work with your psp still. It makes homebrew boot a bit slower.