Is there any pack that has leaning corners for the leaning square blocks, you know those that connect from corner to corner to make a wide white road(folder 5)? and preferably more, basically any block that enhances the original blocks you can place. the more items, the better, for more diversity to my tracks.

I don't want a titlepack(.gbx), just blocks that I can add to the "Item Mode(F4)"

For Stadium.

Check out Maniapark. I think the blocks you are looking for can be found over there.