Hi!

I own a locked PS3 for 10 years, without Multiman or any CFW, and I've always using the OFW from Sony. I never used any hacks.
I own only original Blue Ray discs, but the game fun is getting hard.
I downloaded PS3 full save games for my PS3, but without sucess.
I used Xploder, PS3 Resign, Artemis, Aldo Tools and a lot of other softwares, but I couldn't resign or rehash the save games
If that is difficult, how should I use a cheat system in a easer way?
I own the following old PS3 games:

Ninja Gaiden Sigma BLUS 30036GH
Red Dead Redemption BLUS 30418
Twisted Metal BCUS 98106
LA Noire BLUS 30554
Resident Evil 5 BLUS 30270
Rainbow Six Vegas BLUS 30018
Borderlands 2 BLUS 30982
LA Noire BLUS 30554

Could anyone please help me?

When I used Gameshark or Codebreaker on my PS1 and 2 was a lot easier.
I think PS3 will be my last console, so I deserve a good cheat farewell, right?

Thank you!

PS: Waiting an answer.