[K9IsGodly]

The last time I mapped an interior, I used the editor that BlackSirrah posted. You must use wall objects etc to make the interior to your liking. Once you've done that, you need to actually implement those objects into your game via the CreateDynamicObject function I believe it is. Then, you need to /save your position and when the user enters the door you have created, just SetPlayerPos and set it to your custom interior you've made.