I've never seen vecoma ever support an airtime hill, but I think that is how they would do it.
You know, there is an easy way to remove the NL logo. You just open up MS Paint, and go to cartextures, then look for the vecoma texture, then you open it up, and match the paint and paint over it. You can use the paint bucket tool to piant over everything that you want to color.
There is a site that has all of the cartextures, but I don't know what it is. :?