all characters unlocked, zuo ci at level 99 with lvl 4 weapon, xing cai and oichi with lvl 4 weapon. reset officer if you want. just replace your save.dat file with this file. (remember to back up your original save file, just in case under any circumstances this file does not work!)
under the folders 'my documents' for xp or 'documents' if you're using vista, there should be a folder titled 'KOEI'. open it, you'll see a 'warriors OROCHI' folder, open it again there should be a 'Savedata' folder. open it, you'll have a 'save.dat' file. replace it with the one you downloaded. turn on your game and off you go! enjoy!
(p.s.: as i'v reminded, please backup your original 'save.dat' file in case my file doesn't work. i'v made this thread and uploaded this file because two of the thread in this forum which is similar to mine, their save file doesn't work with mine and also some other users as well.)