How to include own tx into the block I'm mining?

[MrTurtle]

@Bobby

I would setup a mining pool and I wish pay the leasers each time the pool generate a block.
How can I add a transaction into a block I’m mining ?

That way I could collect my own transaction fee when I pay leasers.

There is no general way to do this, also the block could be full when you are minging this preventing the tx to be added.
Also I dont see a real use case for this