I took a look at the Vault 87 Redesigned Mod for you. The mod looks really good in game despite the poor image uploaded by the author. Regardless of the fact that you will never actually reach the door from the outside, I did come across some major issues. The author said he didn't do navmeshing in the cave, and as a result all of the Super Mutants get trapped right at the front of the cave and cause problems. If any are at the entrance of the cave or enter with you then you will get stuck. There is also a locked door further in that I couldn't get to unlock with the provided key. I could bypass these issues using console commands to verify that the rest of the mod seemed to work fine but these issues made it kind of useless for me. Its a shame because it seems to fit perfectly right into the game environment. As a result, I wouldn't really recommend that this mod be put into the guide.