Carrying sectors

[RipNTear4200]

I’ve noticed these kind of sectors being used in many Doom wads. How do I implement them into my wads? I’m using the base Doom 2 game configuration and the editing software I am using is Doom Builder 2. 

[ViolentBeetle]

Not in Doom 2. It's a Boom feature.

[RipNTear4200]

Damn, gonna have to transfer all my maps to the new format. Thanks tho

[ViolentBeetle]

Boom is just an externsion so you won't even need to change anything.