I couldn't quess how to use properly many Leadership Cards, so I sent all my questions to FFG.
Below are the answers I've received. Use those rules in your games, if you like them.
I only forgot about promotional cards, so I had to sent another e-mail, I'll post the reply when I receive it.
Rule Question:
Here's a set of questions concerning Leadership Cards. Rules for those cards can be interpreted in many ways.
OVERMIND
1) "Overmind" (Stage 1.) - Can player gain 1CP (at the start of Regrouping phase) even if he doesn't control the area containing instalation (so he will lose it just after this step)?
ALDARIS
2) "Conclave Fleet" (Stage 1.) - Can player place units from this card on board also, when player controlling Arcturus Mengsk executes Star order as Mobilize?
JIM RAYNOR
3) "Covert Operations" (Stage 1.) - Can Ghosts on this card be used despite Air Support module? Can they be placed on active planet despite not having any transports on its navigation routes?
Does player have to obey the rules of placing orders with this card (occupied or adjacent planets only)?
4) "Make do with little" (Stage 2.) - Is it allowed to build a free worker or transport even without having a base on active planet?
1) The conquest points would not be gained until the "Gain Conquest points" step of the regrouping phase. I will update this in the FAQ.
2) Yes. Using the star order as a Mobilize order would count for using this card.
3) Air support module can prevent these units from being placed (since they did not start on the same planet). Transports however, are NOT required to place these units.
4) The player would need a base on the planet in order to build the worker or transport.
I hope that this answers your questions!
-Corey Konieczka
Fantasy Flight Games
Game Design and Development