game mod code haack help

im really coming back to the game scene because of pc games and how you can mod the game stats health level ect.

for the die hard gamers i dont have time to play and just want to browse through the games.

so how do you mod the game get weapons since the beggining of the game ect?

im really interested in the ffxiii versus and skyrim

ps favorite mod is toggle gain level exp, no random battles with jrpgs