[ART] Many questions

[PutraenusAlivius]

Hello. I want to edit an existing mansionbase window, but first, I got a few questions (And by few, I mean a lot.)

1) How do I make a specific part of a model to be deleted?
2) Is it okay to edit FG models?
3) How do i make something to swing open/close?
4) If I wanna make kinda like a closet door, do I have to create seperate entities for the doors?
5) Since I wanna make an seethrough window, how do I make it to be seethrough?Nvm, I solved it a minute ago. And how do I connect the glass pane to the door?

And please note that I use Blender, since Maya is not available to me.