first you need to download a few things 1. red dead editor-http://www.4shared.com/file/0OFV3x24/Red_Dead_Redemption_Editor.html
2.winRaR- [ Register or Signin to view external links. ] 3.modio- [ Register or Signin to view external links. ] ok first put your single player and multiplayer files onto a usb. then extract them to your desktop using modio. open up the red dead editor. click "file" "open file" and open either your multiplayer or single player first. edit your stats and make sure you have rehash and save checked. when your done just click save file. then drag the file back into modio and replace it with the other files. when it asks to overwrite click yes. then just move both files back to your harddrive and have fun! hope this helps you out.