can we create disc images or extract critical information FROM A DISC with DiscU, yet?
we can't create WUD.
DiscU is a WUD extracted, not a disc dumper, you might want to look at IOSU Hax with WUP Server to extract files from the console. Maybe it has a "direct disc access" where you can extract individual files from disc. real all the
thread, fix94 probably already gave the path to the disc (he gave few different path, I don't remember which ones). or maybe use the WUP Server GUI to navigate accessible folders. I never tried, I don't know if there's disc access.
if all you want is the ticket, then you don't need the disc access. when you insert a disc in the console, the ticket is copied to NAND.
the path to the ticket on NAND is the first path which were given in that thread.
If encrypt Loadine COD BO2 and use an extracted disk tik is possible to install in sysnand?
It will probably work on redNAND, there's no signature patch.
Repacking is using SDK tool or released homebrew legal tools? (I didn't watch the youtube video)
In both case, it will NOT work on sysNAND.
If it's a legal homebrew tool, it will give an error at install because the signature is not correct.
if it's a official SDK tool, the signature will be fine, but will be for development unit ! wrong key ! you might even brick your console. or at best, it will not install because the retail console doesn't know the dev signature.