I don't get it. What does it do? never user any 'mods' mentioned above.
(This is mainly speculation, as I'm not Celeste nor I'm too familiar with how $ony's modern consoles work)
DRM of digital games works by encryption, with part of the key coming from the act.dat and part from the .rif (except for so-called "drm free" .pkg which use a fixed key).
.rap is (on PS3) the final key for a specific .pkg, which must be combined* with official .pkg of commercial games installed from "other sources" to be able to run them
* by using ReactPSN or extracting the .pkg and recreating a drm-free one
NoNpDRM is a Vita homebrew (plugin) that generates fakesigned title decryption keys from software you already have a license (work.bin) for, and allows those fake licenses to be used to play those titles.
You don't directly touch act.dat/rif/rap files, but the equivalent logic is used in the process
But it only works for Vita software, there's no crack for PSP/PS1 mode that allows for unsigned eboot.pbp software to run directly from the livearea (adrenaline + adrenaline bubble maker is cheating) because the checks are rather different
ReactPSN is a PS3 homebrew where you create a new (local) account called "aa" (so that the homebrew can find it), an act.dat will be generated for his profile, and .rap licenses will be installed from USB by converting them to a .rif compatible with that act.dat.
It can also, of course, do the opposite conversion (valid act.dat + .rif to exchange format) and some more stuff...
Modern versions support PSP/PS1/PS2 content too.
The big difference between the 2 is that with NoNpDRM you typically exchange the final license (work.bin) together with the app's files and manually stick it into the right place, while with ReactPSN you load .rap files in bulk, they're converted to whatever the final format is, and you can do that at a separate time (before or after) installing the actual apps...
ReNpDRM will likely combine the advantages of the two. How? Here is where ignorance limits me. On the Vita (this tool will be cross platform) it could mean proper installation of official digital PSP/PS1 games (very maybe unofficial eboots too), on PS3 the automatic installation of licenses and/or support for DRM-free repacks of PS2 games, on PSP installation of PSN packages at all? (I don't know of any current way except converting PSN eboot to ISO and back to eboot if desired)
The above of course is wild mass guessing......
