@pimpones : this can be edited in YourGp4folder\samples\Reverbdata\rever_trackname.bin .Matter is that you need an hexadecimal program to edit it.
@Turbo_lover : I'm glad to see that at least 1 people is coming on my site from times to times :P
New banking is no more banking the whole track around track center axis but using the lower edge as axis. Said another way, lowest edge of the track keep the same altitude than without banking while the track tarmac is raised following banking value.
It's easier to see than to describe
In one word : It's the perfect solution for oval tracks.
Yep, falloff could be a possibility but meshes created with fence builder have too less faces to be edited this way (without subdivision). But I still havn't found any good solution for land creation so far...