Jeroen Bleekemolen is Dutch, not Swiss.

why dont you try to add cars or championship? You are a good member and had do a lot of addition! You could begin with easy car (that have one engine of a concept) for example. You do like you want of course! ;-)

For championships, I don't really know a lot about racing sport. I've thought about adding cars a few times, but I don't know where to get all the information on the motors...

if you put recent cars, you have the informations on official website for example. For pictures this site is very interesting : www.autowp.ru/brands/manufacturer/
And on some website there is good informations (but verify them because some arent serious). Dont put a car without engines (and the most complete possible for engines) and picture without copyright.

I've tried the Cadillac Cyclone, I just forgot to add the designer, and I can't put it in anymore

you can add it now (you cant do it before the car was accepted)