Raw Texture Manager is designed to help you extract and
replace the textures inside Super Smash Bros. Melee's uncompressed
data files. It doesn't analyze the files or their structure in any
way; rather, it tries to match the filename of the .dat file
you're trying to open with one or more definition files
in the Definitions folder. Each definition file lists the
locations, formats, and sizes of each texture in the .dat file it
See the readme file (README.html) for more information.