I am working with Polygons. I have a cube(room) and an open ended rectangle(hallway). I want to join the two. I want to create a hole in the cube that fits the hall perfectly.

Is there a way I can project(etch) the edges of the rectangle onto the cube so all the vertices line up? Then I could just delete the resultant face from the cube and have a hallway leading into a room? Maybe booleans is my only option?

Randy