Thanks downunder. For that many beginners have thinking rest of day.
I did that way last summer:
I had a hive which tried to swarm. I took queen away and I changed larvas in queen cells.
I got 15 queens in the 4 box hive. When queens were near emerging, I splitted whole hive into 2 frames nucs and I installed queen cell in each. Then I took them over 3 mile and nucs started without problems. There were too few workers but I got mated queens from all nucs.
And thanks to Australian researcher, which told that mated queen should be old enough when it is installed to hive. Many Finnish beekeeper have been very glad about that information.