First, play the game under hard mode and save your game at the Warehouse,
then edit your savegame with hex editor. Goto address 02434, it's the first
space of item box (the trunk), add your favorite weapons (Recommend rocket
luncher 0A FA 0F) and with these items:
lighter with oil 43 01
Jill's starcard 2F 01
green gem 44 01
blue gem 45 01
fuse 34 01
power cable 33 01
mixed oil 3A 01
clock t.key 77 01
chronos key 79 01
chronos gear 4E 01
park key 7D 01
card key 60 01
Then play game:
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Take the Warehouse key to open the door, bring lighter, rockket luncher and
Jill's starcard together. Find the door that you have to use "lighter with
oil" to open it, you don't need to save Brad.
If you edit the lockpick to open the Galery door without go into the police
station your game is end you have to go into RPD to get the lockpick.
Leave the police station, open Galery's door by lockpick, continue run to
the room have item box. Next bring green gem, blue gem, fuse, power cable,
mixed oil and find way to Raccoon City Hall put 2 gems to the clock.
Then go to the train, you only get in the train by the second door, don't
use 3 next item at this time. Turn right to visit Nikolai, Mikhail and Carlos
first, if not the game will be hung, then turn back and now you can use your
item to make the train work.
After the train is broken, if you choost jump out the window, you will find
the clock t.key after the picture. Open the item box at the next room to
bring another clock t.key and chronos key. Go to the bookroom, unlock the
green door but don't get in, go into the darkred door to the hall. If you
choost use the break, you should run into the small door, then turn left to
the chapel to get clock t.key and chronos key. Go to the bookroom to unlock
the greendoor and don't get in, turn back hall, go to the upstairs to Clock
Tower.Use lock t.key to pulldown the ladder, climb up then turn left to the
music box, open it with mode: up, down, up, up, down, up to get Chronos chain.
Combine them, then go down the ladder to the door, Nemesis will go in, kill
him and turn back Clock Tower, open Item box to get chronos gear, put it in
the machine,go down the hall.
And from now you play with Carlos, if you want to finish the game with
Jill you have to go to the hospital to find vaccine and bring it back for
her, don't edit it because you can't use it without breakdown the hospital.
If you want to finish the game with Carlos, edit for him from address 2574
(the first space of Carlos's item box) these items:
park key 7B 01
park key 7D 01
Card key 60 01
Bring all them and then go to the park, turn right to the factory.
On your way you will meet Nemesis again and choost "Put him off", you
will go to the Factory.At your right side, there is a door near the bom,
use your card key to open it. Go to the control room and go down the ladder.
Now finish the game with your best weapon. Good luck