I didn't read the text in the link you provided, shame on me. Just looked at the shots and noticed that there is not a single shot of an entire car. Just parts of cars which are much easier to shoot. I did however click on the Shelby hoping to see a larger version of the image. Got one and it shows a few problems but it is not bad overall. However, if you look under the enlarged Shelby image you see 2 typical car show shots with onlookers, bad reflections, etc.
With some patience (waiting for onlookers to get out of the way

)if you stick to chunks of cars you should be able to get some decent shots. Whole cars are just about impossible at car shows.
KmH links:
1/ The photos are too small to really judge of their quality but they don't look too exciting and the few parts I read were really too basic to help a somewhat advance photog.
2/ Aside from the fact that it explains nothing... I love the turntable. Wish I could have one, lol. But the lighting is really not anything to talk about. It will work fine for some situations but the images I saw in that video would not be acceptable to my clients. Bad reflections, large chunks of the car needing more light, bad shadows on the background, etc.
3/ I find this one much more interesting although it still shows a lot of problems. Look at the roof of the car, it is a darker tone than the rest of it. And the interiror of the car is too dark. Among other things, in the overhead set up, it needs also some lights directed at the car. Overall it is not bad and shows well what can be done with limited equipment although the set up looks more like what I use on location than in the studio. I basically build a huge light tent around the car to control the reflections.
Enough said. Car photos are not easy but you can still get some decent shots by sticking to detail shots rather than overall shots. Have fun.