Need for Speed Carbon Hex Editing Guide

Here is some information which should help you hex-edit your savegame or memory, of course not every detail is covered. If you aren't yet familiar with hex-editing you might want to read the MW Hex-Editing Guide & Tutorial, which is for MW though but also gives you some basic ideas about hex-editing a savegame. If you have any questions, comments, or concerns, please make a post here. One of our resident hex editors will try to answer your question as soon as possible.

And don't forget:
Before messing with savegames, always make a backup copy!

Overview

The car data is stored in 5 blocks in the savegame:

• Car slots:
  A car slot contains the car code, link to customization & career slot and some other stuff (like car category). There is space for 200 car slot entries.
• Customization slots:
  A customization slot contains a link to the customization2 & vinyl slot and some customization like performance parts, autosculpt settings, car/rimpaint and ride height. There is space for 75 customization entries.
• Career slots:
  Your heat, impounds and other career related things are stored here. There is space for 10 career slots.
• Customization2 slots:
  A customization2 slot contains the bodies, rims, spoilers, hoods, scoops, windowtint and sometimes a texture vinyl (Most Wanted style vinyl). There should be space for 75 customization2 slots.
• Vinylslots:
  These were newly introduced with Carbon. They will hold the vinyl code, color, size & stuff. There is space for 700 vinyl slots. With a total of 75 customization slots, this will leave you with 9.333 vinyls per car

Savegame Structure

Car Slot

A single carslot uses 14h Bytes and is built like this: http://img367.imageshack.us/img367/6679/thecarslotfinaloe3.png

• Carslot number:
  This is the car slot number, it's usually a subsequent number. However, for some bonus cars it's a unique id.
• Logocode:
  This is the code of the logo/name which will be displayed for your car (Sometimes this code is useless because the game uses the carcode to decide which logo/name to display).
• Carcode:
  This is the actual car code identifying your car, check the last section for logo/carcodes.
• Car membership:
  This identifies where the car will be available (01 = stock, 02 = career, 04 = my cars, 08 = bonus, 10 = custom, 20 = special, 40 = won car, 80 = wingman car).
  The second byte is usually 00, if you change it to 01 the car will show up in the Mazda Dealership and as another side effect it's price will be 0$ in the carlots (Thanks to STAT-X for this info).
• Car category:
  This identifies which category a car will show up (01 = muscle, 02 = exotic, 04 = tuner (Note: Bonus & addon cars use 08/0F instead)).
• Customizaion slot link:
  This is the customization slot link number. It's the number of the customization slot which belongs to this car (Note: it is FF if the car is stock).
• Career slot link:
  This is the career slot link number. It's the number of the career slot which belongs to this car (Note: it is FF if it's not a career car).