Ok, so the pak format is simple:http://aluigi.org/bms/cheengine_gi.bms
The "problem" is the format of the bin files because they are not the original png/dds/hlsl/obj files but they are stored as resources ready to be used by the engine.
For example the bin files in Textures (filename.png_hash.bin) are what I guess raw headerless dds.
So the section of the forum is correct since now the problem is just figuring out how to parse the simple small bin header and creating a dds header for opening the extracted files.
Hopefully some user will notice the topic and will post a solution, this is usually a simple task based on my experience on the forum.