... Are you new to games? For PS3 you go to playstation network and download it with money.
No.
After you download it from the Playstation Store you install it. If you did not get it from the Playstation Store you buy it from there
Absolutely not.
Well, you can get Undead Nightmare into the Red Dead Redemption disc if you download it from the PlayStation Store.
No. Undead Nightmare standalone disc is the Undead Nightmare, Legends and Killers and Liars and Cheats packs (possibly Outlaws to the End too) + Multiplayer. There's a possibility your multiplayer lvl from RDR carries over when using the UN disc. I do not know as i have RDR and the UN download for Xbox but the UN disc for PS3
You can do cheats for guns.
You need to go to Game Marketplace. Find Red Dead Redemption. Then there should be a DLC list.
cheat codes are all around the internet for every game, including red dead redemption. However, if you use the cheats you will be unable to save the game or unlock any achievments. The cheats are easy and fun to remember.
Legally, no.
You can download Red Dead Redemption Undead Nightmare at the playstation store on the playstation network. It costs ten dollars.
the best place is in the bar at theives landing.
Open the menu and go to options and it will be there