Well, I made a quick program (or more like 'drafted') in C++ which allowed me to easily change the game id and save ids of eboot files without rewriting them.
I used one source in the making of this which was made by KingSquitter. (the source was in the Popstation he released, i guess). I credited the part of which I used in the source for it. The program was made in Code::Blocks.
To Use: Drag file(s) to the exe, and a console will open up with 4 choices (and an exit choice). Choose whichever you want, and it'll give you the instructions of what to do. When dragging multiple eboot files, it will change all of them to the specified gameid / saveid of your choice.
Was made because I needed to keep changing the game ids to get Final Fantasy 8 working. Seems with the help of 3.71 m33 and GameID SLPS01222 I was able to pass disc 1 successfully (as well as having carbuncle).
Attached is a zip file with the exe (compiled), as well as the source. Enjoy, i'm sure someone could find this of use.
P.S. Yeah, I'm still an amateur at C++, but I'm learning ;D