Gran Turismo 2 Mod: Audi A4 Avant | Rome Short
20Well, I showed ported tracks, now here's a car ported from the demos. So, here's the A4 Avant at last in the full version of Gran Turismo 2. For the occasion, I put new wheels on it along with some upgrades and competed it in the Station Wagon Cup.
My Gran Turismo 2 video playlist:
https://www.youtube.com/playlist?list=PLEFggSknpsh2a9PhoposAjW2p7Dvyw-Zp
Song Used:
Enthusia OST - Monochrome Roulette
Notes:
- For people that don't know, this car was hidden in the demos of GT2, I just managed to port it over the Audi A3 in order to drive the car. Hence why it's labelled as the A3.
- A thank both MMRivit/Lamar Ceosen for telling me how to port the cars.
- Here's a tutorial that MMRivit posted from his video (https://www.youtube.com/watch?v=MfFYbG9HtCM):
What you will need: 1) a 'disposable' GT2 iso/bin; 2) CDmage; 3) GT2VolTools; 4) Hex Editor.
Note: as of now, if you're porting a track from the demos, you will need to sacrifice one of the already existing tracks in order to get the new one to load in-game. If you're porting a car, you just have to place it into the "carobj" folder (keep in mind that it will be a body-only unless you replace one of the original cars).
Steps:
1) Copy the GT2.VOL file to your hard disk (either by CTRL+C on a mounted iso or through CDmage's "Extract Files..." option);
2) "Explode" the VOL with GT2VolTool to an easily identifiable directory;
No matter if you're porting cars or tracks, we have to fit our files in a VOL of the same size as the original. For this I take a normally unused file as a 'scapegoat' - a file whose bytes will be erased at our need. For my NTSC-U/C copy I took "gtmenu.dat" located in "gtmenu\ita".
3) For this example I'll replace "test_l2" (one of the license test tracks) with "monte" (the famous Monte Carlo track from the demos). "test_l2"'s files on "crsobj" have 73.806 bytes when combined, versus 219.436 bytes of "monte"'s files. Open your 'scapegoat' file with a hex editor, erase the exceeding 145.630 bytes and save. Grab the files related to "monte", rename them "test_l2" and replace the originals on "crsobj". If you want to bring the skybox along, find the files on "bgsobj" and do the same process.
4) Rebuild the VOL. Name it something different from GT2.VOL so you have both the original and tampered files for comparison. You must make sure that both files have the same size, otherwise it may give you a headache. If the altered VOL is bigger than the original, trim the exceeding bytes from the 'scapegoat' and try again.
5) Insert the altered VOL into the iso/bin. Open the 'disposable' iso on CDmage (select 'M2/2352 track' image type) and select Track 1. Right-click on GT2.VOL and select "Import File...", select your altered VOL and wait a few minutes until the program says "Imported file successfully".
6) Try running the altered image on an emulator and see if it works.
7) That's pretty much it!
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Note, with car porting; you have to edit the cno & cdo files with hex editor.
For that, edit the actual files and not the compressed (.gz) version.
You edit them in their normal file state. Use your hex editor to open these, you will see 3 bytes, then the next 5 bytes being zeros (this applies to both files).
Alright, either between those zeros or after those zeros, you're going to have to insert 16 more zeros. As in, after the first 5 "00"; insert 16 more of those. To do that, it depends on the Hex Editor you use. For me, I use "HxD" and my Hex Editor has an "insert byte" option under edit. I click that, enter the amount of bytes I want, then hit "ok". Anyway, you should be able to enter what you need.
After you're done editing the files, compress them back to .gz format. Then, you take those files along with the cdp and cnp files and port them in the final game car files. Now, you should be good to go after that.
I have made a tutorial on Google Docs rewording MMRivit's original tutorial to be easier to understand plus giving some visual aids. Note: It's still a work-in-progress.
https://docs.google.com/document/d/128AejUHj3-3Moq8e9nS0F5aOnzOwmJKcfsD9QCbUPVg/edit?usp=sharing
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