.cmp conversion (Shin Megami Tensei 4 Apocalypse)

[Ploaj]

To decompress them get the "lzx.exe" from here
The command is "lze -d (file)" but you can make a batch script to loop though all files

Code:

for %%f in (*.cmp) do (
   lzx.exe -d %%f
)

copy that into a text document and rename it to ".bat"
put that bat and the lze.exe into the same folder as the .cmp files and run the bat

To view them stex files there are probably programs out there, 
but if you can't find any you can manually view the decompressed files with [this]

The first part is the format, which most of these will be ETC1, then width height of the image, which you may need to guess, then offset to data, which seems to always be 80.
The width and height can be found in 0x0C and 0x10 respectively in the decompressed files if you can't figure them out.