Hey guys, Leon here. I'm gonna show you guys Modding Resi 4's engine. First, take a look at this:

Thanks to Venatyr for finding this out.

Quote:

After some research into the large data files for the PC version, I realized that most of the ".dat" files are actually "G Compression Archives". Download the archive utility here: http://www.emit.jp/gca/gca_eng.html You will be able to extract everything from the following archives (after appending the .gca extension to them): (Make sure to ONLY select the .gca file and then hit extract . Do not touch any other settings!) bgm.dat em.dat emjp.dat etc.dat evd.dat font.dat ogg.dat op.dat rel.dat ss.dat st1.dat st2.dat st3.dat st4.dat st5.dat xfile.dat xscr.dat Just extract them to the installation directory and they should create a sub-folder of the same name. Then delete the original "dat" files. The game will now access all of the extracted files. Now, you can have fun!

After you do that, you need to know what does what. If you simply want to install a Skin or Texture mod, you will only need to worry about Xfile. When you download a mod, It should have a folder called: "Xfile". Take that file, and copy and paste it into your MAIN RE4 DIRECTORY! It'll ask you if you want to replace the files. Say yes to all, and there you go! MAKE SURE TO BACK UP YOUR FILES/FOLDERS!!!! In case you want to uninstall the mod. To uninstall, just re-replace the original files. If you have ANY problems, post below and let me know!

dude the quote didn't wotk it made me uninstall the game