how do you install laminate flooring with multiple rooms at one time with click flooring (since you can only put it in one way)
We did this and cheated; at some doorways we stopped and covered the join with a rather smart strip of brass. 

This makes it a lot easier, especially if:


your house is not quite square
the floors are not quite flat 
you have big temperature variations
you want to have different rooms not running the same way
you want the doors to close snugly