I have to agree with what has already been said.
First Picture: The car in the background is not connected to the model in anyway, (almost looks like it was added in or bluescreened) and on top of that it's cut off. The model's pose is awkward, the hands are both in weird places. The lighting is flat. However the motion of the hair is nice, and the lighting on the buggy is superb.
Second Image: Suffers from some of the same problems, but the skintone on the model also throws me off - the dark glistening skin contrasts too much with the powdery snow face. The lighting is also too powerful here, as her face shows some burnout. However the light captures on her body are very nice, as they halo around it.
Futhermore, you once blasted some of my modeling photos, calling them:
"exactly like ones I did for years before seeking higher education and specialized training in my field"
Now however, you claim that this is your "first" model shoot, and to be fair you're shooting exactly the same type of stuff I shoot! Sure you've got a big fancy dune buggy in the back, but it doesn't change the fact that theses photos seem to be model photography.
I find that fact ironic and a bit funny.
That being said, I congratulate you on your lighting setup, (as I have in the past) and urge you to keep going with the model shoots. They can be very fun, and you CAN get some great images out of them.
I would recommend not using such a large prop unless you can fit it in the entire frame, and connecting the model to the prop, your photo seems to have two subjects. Perhaps placing it parallel to the paper and having the models pose leaning on the "hood" would've been a good idea? Then a smaller DOF would keep the subject (the model) in focus, and use the car as a background instead of a second subject.
Cheers,
Ryan
EDIT: Oh yeah I saw some of your "action" dune buggy stuff and it was really good. Great job!