How do you get a Mine Layer to repeat its order?

[Power Man]

I too have a shipyard ship with cargo and a mine layer component. What I do is have the ship fly to where I want to lay mines. Once there I have it build one turn's worth of mines. Give that a Repete Build command. I then tell it to Launch Units, Mines. I give the ship a repete command. I can then leave it alone untill I get the Launch Warning message when I try to add more than 100 mines in the sector.
Sometime I pre load the ship with mines before sending it off.