Hi GrumpEone, tried the codes, with just one code on for cash, it starts the game but nothing happens, when I try another code like for cars, it hangs, if I try any other code, it hangs... so I am at a loss of what to do. I would love to get in there to build hybrid cars like I did in GT1,2 and 3... sigh.
Hmm, you are 100% sure that your GS is v4 right? As the GS's for sale nowadays are v5 (although the disc may say v1.1 or 1.3), and require verifier codes, which can be converted using an app called OmniConvert.
If you are 100% sure that you are v4, than I am only left with the conclusion that the modding is interfering with the GS. Specifically it seems, the the GS is trying to verify that the disc inserted is a genuine PS disc (as does any PS2 past the second US build, verifies upon the opening and closing of the disc tray), and since the modding circumvents that routine, it may be circumventing the GS memory coding as well, leading to a 'no action' state, or a lock-up.
If you are v4 your main menu should look similar to this:
Have you been able to make any code work for any game, with your GS? If you have there may be options, if you haven't been able to make it work with anything, I'm back to my original conclusion of the modding being the issue.
FYI- the following screenshots are for GSv5, that require verifier codes and are basically the same code engine (non-color screenshot):
Would be listed as V5 or known on other sites as GS-MP
Would be listed as V1.1, with follows the same codes as v5, and is also know as GS-BBE (broadband enabled)
There is also a v1.3 with also has a similar looking main screen as the two above and is titled GS-Cheat Codes, all three follow v5 codes with verifiers.
-note I have seen many pages saying that they were able to make a copied GS2 v4 work on a modded PS2, but the info seems sketchy at best.
the troubleshooting steps I would take:
1. 100% confirm the version of the GameShark 2 (can be confusing because when GS was bought out, the version number changed format upon new releases, as well as the coding engines)
2. confirm the functionality of the Gameshark 2, by trying some of the pre-loaded codes for other games, confirming whether or not those work.
3. If step 1 & 2 are confirmed, then try and find codes for your version of gameshark, if you find a couple that actually work, then you can start narrowing down what the problem is with the many codes listed on this forum.
3b. If you are having problems finding working codes, try different coding formats using the program OmniConvert, try converting codes down to RAW/unencrypted format. Until you find a code that works.
Once you find a code or two that works everything starts to become clear.
Also something I just thought of, I've seen somewhere that there are 2 versions of NTSC GT4, there is a NTSC version and one known as NTSC2, both versions have slightly different memory locations, so this could also be your problem, I'll do a bit of research on this and get back to you.