@flatz shared on Twitter his awesome PS4 Fake PKGs & SELF / FSELF Write-up, and following the PS4 SELF_Info.exe release and recent 4.05 Experiments PlayStation 4 developer IDC made available some PS4 4.05 patches and hooks on Github to enable FSELF / FPKG loading with ShellCore patches (for fake PKG support) implementation yet to come.
Download: ps4-fake-405-master.zip / PS4Fake405 (Simplified payload makefile independent of libPS4) / GIT
To quote from the README.md: PS4 Fake 4.05
Patches and hooks to enable fself/fpkg loading for 4.05, as described by flatz in his writeup.
ShellCore patches (for fake PKG support) not yet implemented.
VVildCard777 lets us know "this is just step 1 fself loading, read the readme, shellcore patches still to come" as @zecoxao also notes on Twitter while you can "compile, run, and replace a system app eboot.bin with an fself, then try to boot the app. it'll run your homebrew instead" he reminds us "it's be better to wait for fpkg support."
- fake_installer - Add payload and installer. (Compiled fake_installer.bin by akenateb and midos2010 with a compiled FSELF.zip working download link from DomyGX)
- fake_payload - Fix fake_payload.x for normal builds. (Compiled fake_payload.bin by akenateb and midos2010 with a compiled FSELF.zip working download link from DomyGX)
Finally, if you haven't checked it out yet recently m0rph3us1987 added some PS4 5.01 kernel slides to fail0verflow's PS4 kexec repo.