Looking for help reviewing some game samples. "Due for Deletion after completion"

Hey everyone,
I was wondering if someone here could take a look at a few game samples I have. I’m interested in using the models from them for modding purposes and would like to understand how they’re structured and whether they’re workable. Any insight or help would be appreciated. Thanks!

Here are the 3D assets from the following games:

1.    Fuel (2009)
What sample is given: Vehicle file (assumed)
Extension: .dpc
Game engine used: Propriety
Method used to obtain sample: straight from game files

2.    Ridge Racer Vita
What sample is given: Vehicle file
Extension: None
Game engine used: Propriety
method used to obtain sample: RRUnpacker by Nenkai

3.    TrackMania DS
What sample is given: Vehicle file
Extension: .nsbmd
Game engine used: Octane (Firebrand games)
method used to obtain sample: DSLazy by Ratx

4.    TrackMania Turbo
What sample is given: Vehicle file
Extension: .nsbmd
Game engine used: Octane (Firebrand games)
method used to obtain sample: DSLazy by Ratx

5.    Xenon Racer
What sample is given: vehicle file
Extension: .uasset
Game engine used: Unreal Engine 4
method used to obtain sample: UnrealPakTool by Epic (I assume)

6.    TrackMania: Build to Race
What sample is given: Vehicle file
Extension: .brmdl
Game engine used: Octane (Firebrand games)
method used to obtain sample: Dolphin Emulator by dolpin-emu

This is the link to number one: https://www.dropbox.com/scl/fi/j4l99aqjd243o07b8ab11/Fuel-2009-Sample.7z?rlkey=ncr8aw3lazxej9mu3m4u75j3i&st=qd8kz6ip&dl=0

Ridge Racer Vita Sample.7z Trackmania Build to Race Sample.7z TrackMania DS Sample.7z TrackMania Turbo DS Sample.7z Xenon Racer Sample.7z