If making it a seperate map:
Unzip Defualt West Coast USA into a folder

Copy all JSON files from West Coast USA to new folder + Spawn images + info.json

Copy Gasstation and Bus route images  (facilities + delivery preview images)


Copy Art>Shapes>objects>flag files
Copy art>shapes>trees grasses files

Copy extra grass files and spanishbayonet in art > shapes > trees

Copy Prefabs?

Open editor and make sure terrain points to the right file

Using notepad++ search for "/levels/west_coast_usa/art/motorsports_art" replace with /levels/plenum_west_coast_usa/art/motorsports_art
/levels/west_coast_usa/art/plenum -> /levels/plenum_west_coast_usa/art/plenum
/levels/west_coast_usa/art/gridmap/shapes/grid/s_gm_groundplane_64m_sand.dae -> /levels/plenum_west_coast_usa/art/gridmap/shapes/grid/s_gm_groundplane_64m_sand.dae


If Copying over West Coast USA:
Fix any areas in editor
Delete exta mission group folders + decals config file
move Plenum mission group to main and add to missiongroup config so it loads and delete original missiongroup folder. 
(makes this load in the future even with further updates without messing with west coast usa)
