Newly discovered? These vehicles are all in the game, just spawn on other maps. The camera angle for 1st & 3rd person may be editable, figuring as how when you die, you see a wrap around of your own death then who killed you, like in bf1942. The cockpit such as in the Atat in hoth are locked down though , so you cant see the ful vehicle, they show cockpit or 1st person looking out with no cockpit, this most likely wont be changable.
The skybox is should be easy with further work but the things such as hard coded entrances to caves and such are a part of each map , so making new maps from old ones or making totally new maps are going to take some time...