Does anyone know of a way to author your own PSX game image? What I am trying to do is replace a few models within a PSX game. I have extracted all of the files off of my original game ISO, and replaced a few of the .TMD mode files. I tried simply authoring an ISO with UltraISO, but my emulator and my ps1 won't run it. I have also tried simply hexing the original ISO with my model files, and that does not seem to work either. Does anyone have any tips for me, or a method for *correctly* doing what I am trying to achieve?
psx games have to be in mode2/xa. if the image is, then it probably checks for filesize/crc. a ppf-patch might work.
When you burn the image use Alcohol 120. When you hit burn it asks the disc type, and playstation is one of the formats in the drop down menu. I cant guarantee anything, but maybe it will help??
Some games have a file on them that stores the start and size of every file on the disc. Which saves it loading the directory. If the game is like that then you can't rebuild the iso without rebuilding the file ( which means you really don't want to rebuild the iso ). replacing one file with an identical sized one should be fine.
EDC? even if I replace the old model with a new one of the same format, and hexed to the same size as the hold one (appending 0's)?
found this site http://www.romhacking.net look in the utility section: iso patcher This tool lets you quickly insert a list of files in a PSX ISO. You can choose the ISO format and optionally regen ECC/EDC on the fly. Instructions are in Chinese but are easily understandable.
You can also extract the files off the ISO and make the ISO when you've finished with programs like psxisomaker or Psx Cd gen. It will obviously not work for games which read directly from sectors, though. PSXisomaker PSX CD gen The difference between PSX iso maker and PSX cd gen is that the former takes a root directory, while the latter is drag-n-drop oriented. I've used both for my PSX dev needs
