If that is for Resident Evil 4/Biohazard

Install on
C:\Program Files\CAPCOM\Biohazard 4\xfile\em < Extract >
C:\Program Files\CAPCOM\Biohazard 4\em < Extract >

If you are firstly modding your RE4.
you dont need GCA to unpack them.Its have the ModLoader itselft.

Extract to:
C:\Program Files\CAPCOM\Biohazard 4

If that is for Grand theft auto San Andreas (GTA SA)
you need the IMGEditor tool or Modloader.

C:\Program Files\Rockstar Games\GTA San Andreas\Modloader\*Create new folder* < Extract >
C:\Program Files\Rockstar Games\GTA San Andreas\models\gta3.img < For SAMP Gaming >
C:\Program Files\Rockstar Games\GTA San Andreas\CLEO\skin.img < For Skin Selector >

^ This one is too difficult to install if that is your FirstTime installing mod.
so i recommend to Back up the files before installing.

If that is for Musou Orochi Z/Warriors Orochi Z for PC.

You need Texmod v09a.

Click >Target Application > Package Mode (Folder icon) > then Run.

I have no experience touching the files.
i have a tool but i dont mostly use since its Chinese Language.
plus.. The archieve are Sensitive.


REGARDS
DOA_Marie Mods 2013 - 2015 Modding Service.