/jp/ - Otaku Culture

>>2281141

>>2257243
Why is Miki such a slut?

Hey guys,
Currently trying to extract script files from iM@S SP.

This guy in the Noah porting thread figured out the structure of YUM files and posted a program to unpack it into files here: http://archive.easymodo.net/cgi-board.pl/jp/thread/2245776#p2248828

Here's what we figured out so far:
The files with the email data (the emails people send you ingame) are really easy to figure out. They're just plain SJIS text in files 4823.bin - 4834.bin (4823 has some unrelated data at the top, I wonder if files can be split into subfiles), they're in plain text and there's offsets for each email at the end. Really easy to write a repacker for them (pic related), too bad they're mostly irrelevant.

There are a bunch of files with valid WAV headers, but they're all unplayable. I'm guessing they use some kind of non-standard compression inside. Not a big deal, since we don't need to mess with the audio to translate the script.

The real problem is the script files. The guy who posted the unpacker was right, some files are compressed using LZSS compression. I really can't figure out the structure of the script files, though. The first part seems to be script text compressed using LZSS, then a bunch of data that most likely isn't compressed at all, since it generates a bunch of random repeated text if uncompressed. Script files are probably split into subfiles as well.