You use the Diesel Model tool for that
Put in the .model files in Diesel Model tool, and it'll convert it to .obj files.

.texture comes in diffuse and normal
You can use either GIMP with dds plugin
Or if you use photoshop, you use DDSview program to open and save them as psd

I dont think you need the .mat_cfg files outside of payday modding uses..

Ok, because some of these don't come with a .model file. Such as the White Medic I downloaded; he will play an important role in my MMD drama as one of the doctor characters. The SWAT guys (https://modworkshop.net/mydownloads.php?action=view_down&did=354) and the Taser (https://modworkshop.net/mydownloads.php?action=view_down&did=1523) will play an important role in defending the civilian characters. Also, some of the weapons, bombs, ammo bags, etc don't come with .model files. So please, make sure all these have .model files so I can convert, rig, and use these for MMD. Please and thank you. Just put the .model file into the ZIP, RAR, or whatever file and I'll deal with the rest in Blender.