ROM Hacking Discussion / Re: [Need Help PSP rom hacking] Gundam Assault Survive [JP] [Need Hack Tune Mission]« on: July 28, 2016, 12:54:55 am »
I think you have to try further and harder, otherwise this should be a "Help Request Ad". Or a post on the thread "for all those without the knowledge but with all the ideas".
MD5 (google for it -> wikipedia for instance) is a well-known checksum algorithm. I would expect it to be generated (without extra data) as a "signature to check integrity" for the .dat files with the same name.
".idx" sounds a lot like short for "index" and the contents you highlight suggests it is just that: a list of "titles" of contents, probably of the enormous .dat file.
Just so you know, eboot is the main program (executable). That's just the way it is on PSP.
EDIT - I checked easy-to-find CWCheats and I don't see anything interesting for the goals you've mentioned.
What is the format of the .dat files? That's the real question. it's probably something specific to this game. (Or maybe it's a common format with other entries in the same series, if you are lucky and they used a common format.) You have to open it and try to guess. Or use a debugger and guess from what the program does with the files.
There's probably no existing tool for it (I take it you did google fo that, right?)
Which means I'd suggest you read the "Getting Started" sectionabout hexadecimal etc, and especially FAST's excellent intro doc. (It doesn't matter if it is about GBA/DS, most of its techniques apply to PSP too.)
yeah i did google for tool and it no have.
i will try use debugger and guess as you told me.hope cheat engine 64 can do something and .idx not hard to use
anyway thank for your information that come help noob like me