Editing/Modding Entity/Framework for GTA5

Hello, I’m new here. Currently I am learning on how to customize interiors for my own GTA 5 server. Right now I have an issue as using CodeWalker only allows to remove/add entities.

Is there any tutorials on how to actually edit the entity files itself and stream it to the server? For example. The benny custom workshop has some doors actually tied to the framework/shell thus removing it will actually remove the shell of bennys.

Any videos or threads explaining on what to use to edit those things?

For example as you can see, I am trying to clear bennys customs so I can make more room but to remove that door will remove the shell. Any ways to only remove that door or tools to customize that actual entity/frame?