if it needs to be player occupied houses then you either need to shrink or remove the no build zone. Things like shuttles can be added using the world snapshot editor in SIE. Extract the snapshot for which ever planet you want to modify. Add the shuttleport to the required co-ords. Package the snapshot into a new tre and load into server and client. Then modify your planetmanager.lua file to include the new shuttleport. Don't forget to reset clientobjects.db before starting up the server
The wonderful Tatwi made this SUI to allow you to place structures anywhere, including some that are not even placable by other means (without modding them in yourself) they bypass planetary restrictions as well as the grid.