TDB Mapping Project: Ganghouse

I can do exterior mapping pretty good now, but interior mapping is where I'm stuck. I understand how to make the interior, but how is it gonna be made so you can enter it? Is that something CPT's gonna have to do scripting it or something? If so, am I gonna have to make the icon outsider the "door" of the interior so the /enter or Y and N shit can be scripted on it and I just have to do the interior and shit? Like IDK I'm so confused and none of the videos I found are english or explain how it's gonna be like on SAMP. Jeez, I am so confused, OMG...

You don't have to, just get an interior you like and map object inside it and Compton will track the location on where it is and will set up the /enter
/exit places.