How difficult would it be to add a menu item to the in-game menu? The text probably isn't hard, but what about linking it to a function.
For now I'm thinking about the PC version.
Well I can tell you that in the English version of ff7.exe, you can find the string array of the menu item names at 0x5192C0 ~ 0x51939B. (You can consistently find it by searching for "30 28 33" -- PHS). Each String is allocated 20 bytes of memory, and there's exactly enough room for the 11 strings, but they're part of a larger array of general strings used in the menu, so it might not be hard to extend the array by 1 element and cram some text into 0x51948C...
As for actually adding it in, AFAIK, there isn't room for another item in the menu context, so one would either have to figure out how to shove the texts closer together or extend the blue menu window further down the screen. I'm not exactly sure, but I think Aali might have some control over things like that with his driver:
I control what gets rendered where
Adding a function would be quite difficult. I don't see it being a possibility within the confines of hex editing as increasing the filesize throws off all sorts of flow control. I think that perhaps somebody in the QGears project might have a better idea than me, but if you can find out where those strings I mentioned earlier are referenced in the exe, that
might be a start...
Just out of curiosity, what would you want the new menu item to do?
